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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. 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[`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","readmeFilename":"README.md","_id":"pdf-lib@0.2.1-rc1","_npmVersion":"5.6.0","_nodeVersion":"10.1.0","_npmUser":{"name":"hopding","email":"andrew.dillon.j@gmail.com"},"dist":{"integrity":"sha512-hUVKkJHXa5Io4Wp4XpsHKXL1FvoCc6JptgT1Ek7Oo9Ywob6bT0oitVomrz1FjcSAQs0CCS1oBwBEZeUeBsQX3A==","shasum":"0907c4be38c71eee8592f645d4fbf2d025fd6068","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.2.1-rc1.tgz","fileCount":437,"unpackedSize":4030858,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. 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It requires some knowledge about the logical structure of PDF document to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","readmeFilename":"README.md","_id":"pdf-lib@0.2.1-rc2","_npmVersion":"6.1.0","_nodeVersion":"10.5.0","_npmUser":{"name":"hopding","email":"andrew.dillon.j@gmail.com"},"dist":{"integrity":"sha512-BjiBRwuYAq21vwC5bSUgwMuIzYQ+uNLjP29aB1bBYgmL6S5R2zrffAmVpdegcKd5Ube+g1AASeP0H162YOiz+w==","shasum":"efcdd1cbe6d883873a76dcc8935ff1126d233bc1","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.2.1-rc2.tgz","fileCount":437,"unpackedSize":4040949,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF document to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","readmeFilename":"README.md","_id":"pdf-lib@0.3.0-rc1","_npmVersion":"6.1.0","_nodeVersion":"10.5.0","_npmUser":{"name":"hopding","email":"andrew.dillon.j@gmail.com"},"dist":{"integrity":"sha512-3lDKW0Wsekz8fGBIERBFQ0s7qCNSIKhzWGtHOjbH4kThp+PioYEFPh5mFqy9GL4GeZJKQzNQbZavgpmL8Czupg==","shasum":"5978084cd3e98e87b27e812fd19f7d510dd6c9f4","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.3.0-rc1.tgz","fileCount":445,"unpackedSize":3538540,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF document to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","readmeFilename":"README.md","_id":"pdf-lib@0.3.0-rc2","_npmVersion":"6.1.0","_nodeVersion":"10.5.0","_npmUser":{"name":"hopding","email":"andrew.dillon.j@gmail.com"},"dist":{"integrity":"sha512-kPxgZv42BbwfouDVzFuA2nmFi6tC3SR0RCTPzSXxInp5B/FF1bMruSIZ5wAxty+UuQRfA+6W1wCA5Svtp3PmKA==","shasum":"a183ac2a7065c54477a95b6b0d62ded5e326b594","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.3.0-rc2.tgz","fileCount":445,"unpackedSize":3540475,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF document to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","readmeFilename":"README.md","_id":"pdf-lib@0.3.1-rc3","_npmVersion":"6.1.0","_nodeVersion":"10.5.0","_npmUser":{"name":"hopding","email":"andrew.dillon.j@gmail.com"},"dist":{"integrity":"sha512-XZIICyNb3S/dIjVm4myoZs82dT7Uu8c26V1kwWnIzLzfynNmuDfkJuMdoi0YNSqxqmlHRgnacKUcCfTw5F7SpQ==","shasum":"c33dec298598a7ec7aadde3bc650431781620021","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.3.1-rc3.tgz","fileCount":445,"unpackedSize":3555527,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF document to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","readmeFilename":"README.md","_id":"pdf-lib@0.4.0-rc1","_npmVersion":"5.6.0","_nodeVersion":"9.11.2","_npmUser":{"name":"hopding","email":"andrew.dillon.j@gmail.com"},"dist":{"integrity":"sha512-ttQhIqyAE0U0nq2hdMLSc2f9PTcN2R8/Q6QJizwE7OTdHEggkPBa17EWUAlHqZAdjnlYiKJY2TQg+8WgGCmx3A==","shasum":"e998b3f4cefa4cf30e0cd65fcec70a58c474718a","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.4.0-rc1.tgz","fileCount":453,"unpackedSize":3558764,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Build Status\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. 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align=\"center\">pdf-lib</h1>\r\n\r\n<div align=\"center\">\r\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\r\n</div>\r\n<div align=\"center\">\r\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\r\n</div>\r\n\r\n<br />\r\n\r\n<div align=\"center\">\r\n  <!-- NPM version -->\r\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\r\n    <img\r\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\r\n      alt=\"NPM Version\"\r\n    />\r\n  </a>\r\n  <!-- Build Status -->\r\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\r\n    <img\r\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\r\n      alt=\"CircleCI Build Status\"\r\n    />\r\n  </a>\r\n  <!-- Build Status -->\r\n  <a href=\"https://prettier.io/\">\r\n    <img\r\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\r\n      alt=\"Build Status\"\r\n    />\r\n  </a>\r\n</div>\r\n\r\n<div align=\"center\">\r\n  <h3>\r\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\r\n      Documentation\r\n    </a>\r\n    <span> | </span>\r\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\r\n      Examples\r\n    </a>\r\n  </h3>\r\n</div>\r\n\r\n## Table of Contents\r\n* [Motivation](#motivation)\r\n* [Features](#features)\r\n* [Usage Examples](#usage-examples)\r\n  * [Document Creation](#document-creation)\r\n  * [Document Modification](#document-modification)\r\n  * [Copying Pages](#copying-pages)\r\n* [Installation](#installation)\r\n* [API Documentation](#api-documentation)\r\n* [Prior Art](#prior-art)\r\n* [License](#license)\r\n\r\n## Motivation\r\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\r\n\r\nTwo of `pdf-lib`'s design requirements since its inception are to:\r\n1. Support modification (editing) of existing documents.\r\n2. Work in all JavaScript environments - not just in Node or the browser.\r\n\r\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\r\n\r\n## Features\r\n* Create new PDFs\r\n* Modify existing PDFs\r\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\r\n* Add Pages\r\n* Insert Pages\r\n* Remove Pages\r\n* Draw Text\r\n* Draw Images\r\n* Draw Vector Graphics\r\n* Embed Fonts\r\n* Embed Images\r\n\r\n## Usage Examples\r\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\r\n\r\n### Document Creation\r\n```javascript\r\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\r\n\r\nconst pdfDoc = PDFDocumentFactory.create();\r\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\r\n\r\nconst page = pdfDoc\r\n  .createPage([350, 500])\r\n  .addFontDictionary('Times-Roman', timesRomanFont);\r\n\r\nconst contentStream = pdfDoc.createContentStream(\r\n  drawText('Creating PDFs in JavaScript is awesome!', {\r\n    x: 50,\r\n    y: 450,\r\n    size: 15,\r\n    font: 'Times-Roman',\r\n    colorRgb: [0, 0.53, 0.71],\r\n  }),\r\n);\r\n\r\npage.addContentStreams(pdfDoc.register(contentStream));\r\n\r\npdfDoc.addPage(page);\r\n\r\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\r\n```\r\n\r\n### Document Modification\r\n```javascript\r\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\r\n\r\n// This should be a Uint8Array.\r\n// This data can be obtained in a number of different ways.\r\n// If your running in a Node environment, you could use fs.readFile().\r\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\r\nconst existingPdfDocBytes = ...\r\n\r\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\r\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\r\n\r\nconst pages = pdfDoc.getPages();\r\nconst page  = pages[0];\r\n\r\npage.addFontDictionary('Helvetica', helveticaFont);\r\n\r\nconst contentStream = pdfDoc.createContentStream(\r\n  drawText('This text was added to the PDF with JavaScript!', {\r\n    x: 25,\r\n    y: 25,\r\n    size: 24,\r\n    font: 'Helvetica',\r\n    colorRgb: [0.95, 0.26, 0.21],\r\n  }),\r\n);\r\n\r\npage.addContentStreams(pdfDoc.register(contentStream));\r\n\r\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\r\n```\r\n\r\n### Copying Pages\r\n```javascript\r\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\r\n\r\n// These should be a Uint8Arrays. (see Document Modification example for more details)\r\nconst firstDonorPdfBytes = ...\r\nconst secondDonorPdfBytes = ...\r\n\r\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\r\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\r\n\r\n// We'll copy the fourth page from the first donor document, and the\r\n// first page from the second donor document.\r\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\r\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\r\n\r\nconst pdfDoc = PDFDocumentFactory.create();\r\n\r\n// Copy over the pages from the donor documents into our new document\r\npdfDoc.addPage(firstDonorPage);\r\npdfDoc.insertPage(0, secondDonorPage);\r\n\r\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\r\n```\r\n\r\n## Installation\r\n### NPM Module\r\nTo install the latest stable version:\r\n```bash\r\n# With npm\r\nnpm install --save pdf-lib\r\n\r\n# With yarn\r\nyarn add pdf-lib\r\n```\r\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\r\n\r\n### UMD Module\r\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\r\n\r\nThe following builds are available:\r\n\r\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\r\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\r\n\r\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\r\n\r\n```javascript\r\n// NPM module\r\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\r\n\r\n// UMD module\r\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\r\nvar drawText = PDFLib.drawText;\r\n```\r\n\r\n## API Documentation\r\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\r\n\r\n## Prior Art\r\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\r\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\r\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\r\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\r\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\r\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('Times-Roman', timesRomanFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'Times-Roman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaFont] = pdfDoc.embedStandardFont('Helvetica');\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaFont);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText('This text was added to the PDF with JavaScript!', {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@0.6.0-rc1","dist":{"shasum":"4552c5ef5a160d9724fdf91bd9997133f741d65b","integrity":"sha512-KqpfdAF43dBZU1fJE4hOFDgOPJ8QOxyFXXj3wIPsOGpTg3c4d1snuy15KtH58uwvsXSOIRL55zjXGpAD6Urtfw==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.6.0-rc1.tgz","fileCount":505,"unpackedSize":3971399,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@0.6.1-rc1","dist":{"shasum":"c12f10df0baa7917ea8543d27bdb14b9c064e809","integrity":"sha512-Vzd2p25DnXt5eDKmBtGwMKO9C+kYfAO00DVRKazTnjGOzwKQDNGB9fldg7NW1lzRz2C/9++W5cz8XMURL6hTBw==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.6.1-rc1.tgz","fileCount":505,"unpackedSize":3973608,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@0.6.1-rc2","dist":{"shasum":"89244b264d485155d9fbd2a2eca8b3621f70d8aa","integrity":"sha512-fbII1+6BnzQMP3BqEw9KRb1XLVHB4VSD+FKszyPlu0PpNjgnt7vFAe4YJ5rhBHvDAFexbKMs8EOuU+prqUcV7g==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.6.1-rc2.tgz","fileCount":505,"unpackedSize":3975469,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@0.6.1-rc3","dist":{"shasum":"0721b63df66d898b2ee9b7f4e347da3cc04dfbf8","integrity":"sha512-x/Q/I2c9bFXwChEGNQLLdABgdjCuxID4EinnBJmCPLZwy9y3EnrfJrU0aaNAWs4m1ONG42fiT5sUA4Hcoo0tzA==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.6.1-rc3.tgz","fileCount":505,"unpackedSize":3976120,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@0.6.2-rc1","dist":{"shasum":"416c7a81ce3a98644cd5d715f14c706e4e9120b3","integrity":"sha512-xB8Aey8kaOcGpmCe+hVD1vwOqGCZreQ1JavH1itVproTnddaIXItYv9R7MH88bMe3hbWJkUnv6emOKv/Gbpktg==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.6.2-rc1.tgz","fileCount":505,"unpackedSize":3981693,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@0.6.2-rc2","dist":{"shasum":"c2f843d55cfdc970c589e68dea39fa6ec0687295","integrity":"sha512-x6iYNmC2atsRfYP8fBxh2SD/lm3JfwZaRSlW9X8dmTda6Uqiabaot/D0Xfk/7ZqBhgW4WSipyeUNul98Q7fGBg==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.6.2-rc2.tgz","fileCount":505,"unpackedSize":3981210,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@0.6.4-rc1","dist":{"shasum":"a7e78f00f4511caca13fcbee99a5eb670feb2b05","integrity":"sha512-/r3oQCAFfoVnLne2RXEeIWijzSoLQR+4DFDvT54rsTnyY5uWzAAdLpQJbJE0Drw9hL8KF6tQV1tRSnZL0vh9vg==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-0.6.4-rc1.tgz","fileCount":509,"unpackedSize":3984148,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Encryption Handling](#encryption-handling)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw Vector Graphics\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create();\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently two apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n```js\nimport { PDFDocument } from 'pdf-lib';\nimport fontkit from '@pdf-lib/fontkit';\n\nconst pdfDoc = await PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.0.0-beta.1","dist":{"shasum":"3d0d028fcdc8a69ce1f55b36220431feea64d4d3","integrity":"sha512-t27KmMMNkGPUtOZQvURzBnNx7/G7K8blTPzuOEZwuGUqvu9SX6d9ctNctsHFDlgAaa3TKtfxMmZ7EgJ6bM8eLg==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.0.0-beta.1.tgz","fileCount":807,"unpackedSize":4413171,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Encryption Handling](#encryption-handling)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw Vector Graphics\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create();\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently two apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n```js\nimport { PDFDocument } from 'pdf-lib';\nimport fontkit from '@pdf-lib/fontkit';\n\nconst pdfDoc = await PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">pdf-lib</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<div align=\"center\">\n  <h3>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/docs\">\n      Documentation\n    </a>\n    <span> | </span>\n    <a href=\"https://github.com/Hopding/pdf-lib/tree/master/examples\">\n      Examples\n    </a>\n  </h3>\n</div>\n\n## Table of Contents\n* [Motivation](#motivation)\n* [Features](#features)\n* [Usage Examples](#usage-examples)\n  * [Document Creation](#document-creation)\n  * [Document Modification](#document-modification)\n  * [Copying Pages](#copying-pages)\n  * [Embed Font and Measure Text](#embed-font-and-measure-text)\n* [Installation](#installation)\n* [API Documentation](#api-documentation)\n* [Contributing](#contributing)\n* [Prior Art](#prior-art)\n* [License](#license)\n\n## Motivation\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s design requirements since its inception are to:\n1. Support modification (editing) of existing documents.\n2. Work in all JavaScript environments - not just in Node or the browser.\n\nThere are other good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones (e.g. [`pdfkit`](https://github.com/devongovett/pdfkit), [`jspdf`](https://github.com/MrRio/jsPDF), [`pdfmake`](https://github.com/bpampuch/pdfmake)). [`hummus`](https://github.com/galkahana/HummusJS) is a NodeJS library capable of both creating and modifying PDF documents. However, `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer). This means that it cannot run in _all_ JavaScript environments. For example, you cannot use `hummus` in the Browser or in React Native.\n\n## Features\n* Create new PDFs\n* Modify existing PDFs\n* _**New:**_ [Copy pages between PDFs](#copying-pages)\n* Add Pages\n* Insert Pages\n* Remove Pages\n* Draw Text\n* Draw Images\n* Draw Vector Graphics\n* Embed Fonts\n  * _**New:**_ UTF-8 and UTF-16 character sets are supported\n  * _**New:**_ Measure width and height of text\n* Embed Images\n\n## Usage Examples\nMore detailed examples are available [here](https://github.com/Hopding/pdf-lib/tree/master/examples).\n\n### Document Creation\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [timesRomanRef, timesRomanFont] = pdfDoc.embedStandardFont(\n  StandardFonts.TimesRoman,\n);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('TimesRoman', timesRomanRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'), {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: 'TimesRoman',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Document Modification\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, StandardFonts, drawText } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst existingPdfDocBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.load(existingPdfDocBytes);\nconst [helveticaRef, helveticaFont] = pdfDoc.embedStandardFont(\n  StandardFonts.Helvetica,\n);\n\nconst pages = pdfDoc.getPages();\nconst page  = pages[0];\n\npage.addFontDictionary('Helvetica', helveticaRef);\n\nconst contentStream = pdfDoc.createContentStream(\n  drawText(helveticaFont.encodeText('This text was added to the PDF with JavaScript!'), {\n    x: 25,\n    y: 25,\n    size: 24,\n    font: 'Helvetica',\n    colorRgb: [0.95, 0.26, 0.21],\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Copying Pages\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter } from 'pdf-lib';\n\n// These should be a Uint8Arrays. (see Document Modification example for more details)\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\nconst firstDonorPdfDoc = PDFDocumentFactory.load(firstDonorPdfBytes);\nconst secondDonorPdfDoc = PDFDocumentFactory.load(secondDonorPdfBytes);\n\n// We'll copy the fourth page from the first donor document, and the\n// first page from the second donor document.\nconst firstDonorPage = firstDonorPdfDoc.getPages()[3];\nconst secondDonorPage = secondDonorPdfDoc.getPages()[0];\n\nconst pdfDoc = PDFDocumentFactory.create();\n\n// Copy over the pages from the donor documents into our new document\npdfDoc.addPage(firstDonorPage);\npdfDoc.insertPage(0, secondDonorPage);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n### Embed Font and Measure Text\nThis example demonstrates the use of the `font.widthOfTextAtSize()` and \n`font.heightOfFontAtSize()` methods for a `font` embedded with \n`pdfDoc.embedNonstandardFont`. But note that these methods also exist on standard \nfonts embedded with `pdfDoc.embedStandardFont`.\n```javascript\nimport { PDFDocumentFactory, PDFDocumentWriter, drawText, drawRectangle } from 'pdf-lib';\n\n// This should be a Uint8Array.\n// This data can be obtained in a number of different ways.\n// If your running in a Node environment, you could use fs.readFile().\n// In the browser, you could make a fetch() call and use res.arrayBuffer().\nconst fontBytes = ...\n\nconst pdfDoc = PDFDocumentFactory.create();\nconst [fontRef, font] = pdfDoc.embedNonstandardFont(fontBytes);\n\nconst page = pdfDoc\n  .createPage([350, 500])\n  .addFontDictionary('FontName', fontRef);\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 15;\nconst textWidth = font.widthOfTextAtSize(text, textSize);\nconst textHeight = font.heightOfFontAtSize(textSize);\n\nconst contentStream = pdfDoc.createContentStream(\n  // Draw text on page\n  drawText(font.encodeText(text), {\n    x: 50,\n    y: 450,\n    size: textSize,\n    font: 'FontName',\n    colorRgb: [0, 0.53, 0.71],\n  }),\n  // Draw a box around the text\n  drawRectangle({\n    x: 50,\n    y: 450,\n    width: textWidth,\n    height: textHeight,\n    borderColorRgb: [1],\n    borderWidth: 0.5,\n  }),\n);\n\npage.addContentStreams(pdfDoc.register(contentStream));\n\npdfDoc.addPage(page);\n\nconst pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);\n```\n\n## Installation\n### NPM Module\nTo install the latest stable version:\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n* https://unpkg.com/pdf-lib/dist/pdf-lib.js\n* https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocumentFactory, drawText } from 'pdf-lib';\n\n// UMD module\nvar PDFDocumentFactory = PDFLib.PDFDocumentFactory;\nvar drawText = PDFLib.drawText;\n```\n\n## API Documentation\nAPI documentation is available [here](https://github.com/Hopding/pdf-lib/tree/master/docs).\n\n## Contributing\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](https://github.com/Hopding/pdf-lib/blob/master/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine.\n\n## Prior Art\n* [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PDFFontFactory.ts#L64-L68), [PNG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/PNGXObjectFactory.ts#L19-L23), and [JPG embedding](https://github.com/Hopding/pdf-lib/blob/AddDocumentation/src/core/pdf-structures/factories/JPEGXObjectFactory.ts#L32-L36) was especially useful.\n* [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n* [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n* [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer).\n* [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n* [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n","licenseText":"MIT License\n\nCopyright (c) 2018 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Encryption Handling](#encryption-handling)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw Vector Graphics\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create();\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently two apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n```js\nimport { PDFDocument } from 'pdf-lib';\nimport fontkit from '@pdf-lib/fontkit';\n\nconst pdfDoc = await PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.0.0-beta.3","dist":{"shasum":"d91f9d3d0007650fbea4237aae0729106a0d084b","integrity":"sha512-LA3G5eT1rdBWuShmeWHFaMscCRnIaIcJFJSRPaFeBQy9PRTPgxL0YeSLOpL92xnFmuwX0Spw0PEI1tXntauIGQ==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.0.0-beta.3.tgz","fileCount":799,"unpackedSize":4414136,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.3.2","dist":{"shasum":"8f73c45429e5938f11a46522f089a412e387b3ce","integrity":"sha512-mmATVbcJVPVYO9VOIppW3sX7VuLu5oFYKJj+63acDFKZ4a9B4ER+MBRe9fHw89Jda82k18PaDOgonv2H5rg5UA==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.3.2.tgz","fileCount":844,"unpackedSize":5550231,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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href=\"https://pdf-lib.js.org\">\n<h1 align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n</a>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<br />\n\n> **Learn more at [pdf-lib.js.org](https://pdf-lib.js.org)**\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed PDF Pages](#embed-pdf-pages)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n  - [Set Document Metadata](#set-document-metadata)\n  - [Draw SVG Paths](#draw-svg-paths)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Documentation](#documentation)\n- [Encryption Handling](#encryption-handling)\n- [Migrating to v1.0.0](#migrating-to-v1)\n- [Contributing](#contributing)\n- [Tutorials and Cool Stuff](#tutorials-and-cool-stuff)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw Vector Graphics\n- Draw SVG Paths\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n- Set document metadata\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rxwsc8f5/12/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/64zajhge/)\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/ybank8s9/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create();\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PDF Pages\n\n_This example produces [this PDF](assets/pdfs/examples/embed_pdf_pages.pdf)_ (when [this PDF](assets/pdfs/american_flag.pdf) is used for the `americanFlagPdfBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `usConstitutionPdfBytes` variable).\n\n<!-- [Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/2/) -->\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst americanFlagPdfBytes = ...\nconst usConstitutionPdfBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the American flag PDF bytes\nconst [americanFlag] = await pdfDoc.embedPdf(americanFlagPdfBytes)\n\n// Load the U.S. constitution PDF bytes\nconst usConstitutionPdf = await PDFDocument.load(usConstitutionPdfBytes)\n\n// Embed the second page of the constitution and clip the preamble\nconst preamble = await pdfDoc.embedPage(usConstitutionPdf.getPages()[1], {\n  left: 55,\n  bottom: 485,\n  right: 300,\n  top: 575,\n})\n\n// Get the width/height of the American flag PDF scaled down to 30% of \n// its original size\nconst americanFlagDims = americanFlag.scale(0.3)\n\n// Get the width/height of the preamble clipping scaled up to 225% of \n// its original size\nconst preambleDims = preamble.scale(2.25)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the American flag image in the center top of the page\npage.drawPage(americanFlag, {\n  ...americanFlagDims,\n  x: page.getWidth() / 2 - americanFlagDims.width / 2,\n  y: page.getHeight() - americanFlagDims.height - 150,\n})\n\n// Draw the preamble clipping in the center bottom of the page\npage.drawPage(preamble, {\n  ...preambleDims,\n  x: page.getWidth() / 2 - preambleDims.width / 2,\n  y: page.getHeight() / 2 - preambleDims.height / 2 - 50,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rgu6ca59/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Set Document Metadata\n\n_This example produces [this PDF](assets/pdfs/examples/set_document_metadata.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/vcwmfnbe/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available metadata fields on the PDFDocument. Note that these fields\n// are visible in the \"Document Properties\" section of most PDF readers.\npdfDoc.setTitle('🥚 The Life of an Egg 🍳')\npdfDoc.setAuthor('Humpty Dumpty')\npdfDoc.setSubject('📘 An Epic Tale of Woe 📖')\npdfDoc.setKeywords(['eggs', 'wall', 'fall', 'king', 'horses', 'men'])\npdfDoc.setProducer('PDF App 9000 🤖')\npdfDoc.setCreator('pdf-lib (https://github.com/Hopding/pdf-lib)')\npdfDoc.setCreationDate(new Date('2018-06-24T01:58:37.228Z'))\npdfDoc.setModificationDate(new Date('2019-12-21T07:00:11.000Z'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Draw SVG Paths\n\n_This example produces [this PDF](assets/pdfs/examples/draw_svg_paths.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bwaomr9h/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\n\n// SVG path for a wavy line\nconst svgPath =\n  'M 0,20 L 100,160 Q 130,200 150,120 C 190,-40 200,200 300,150 L 400,90'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\npage.moveTo(100, page.getHeight() - 5)\n\n// Draw the SVG path as a black line\npage.moveDown(25)\npage.drawSvgPath(svgPath)\n\n// Draw the SVG path as a thick green line\npage.moveDown(200)\npage.drawSvgPath(svgPath, { borderColor: rgb(0, 1, 0), borderWidth: 5 })\n\n// Draw the SVG path and fill it with red\npage.moveDown(200)\npage.drawSvgPath(svgPath, { color: rgb(1, 0, 0) })\n\n// Draw the SVG path at 50% of its original size\npage.moveDown(200)\npage.drawSvgPath(svgPath, { scale: 0.5 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently three apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n- [**`rn`**](apps/rn) - contains [tests](apps/rn/src/tests/) for `pdf-lib` in React Native environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a React Native environment.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/) or [jsDelivr](https://www.jsdelivr.com/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/pdf-lib@1.3.0/dist/pdf-lib.min.js\n> - https://cdn.jsdelivr.net/npm/pdf-lib@1.3.0/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n```js\nimport { PDFDocument } from 'pdf-lib';\nimport fontkit from '@pdf-lib/fontkit';\n\nconst pdfDoc = await PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n> - https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create();\npdfDoc.registerFontkit(fontkit);\n```\n\n## Documentation\n\nAPI documentation is available on the project site at https://pdf-lib.js.org/docs/api/.\n\nThe repo for the project site (and generated documentation files) is\nlocated here: https://github.com/Hopding/pdf-lib-docs.\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n<h2 id=\"migrating-to-v1\">Migrating to v1.0.0</h2>\n\nThe latest release of `pdf-lib` (`v1.0.0`) includes several breaking API changes. If you have code written for older versions of `pdf-lib` (`v0.x.x`), you can use the following instructions to help migrate your code to v1.0.0.\n\nNote that many of the API methods are now asynchronous and return promises, so you'll need to `await` on them (or use promise chaining: `.then(res => ...)`).\n\n- Rename _`PDFDocumentFactory`_ to **`PDFDocument`**. `PDFDocument.create` and `PDFDocument.load` are now async (they return promises), so you'll need to `await` on them.\n\n* To create a new PDF document:\n\n  ```js\n  const pdfDoc = await PDFDocument.create();\n  ```\n\n* To retrieve and load a PDF where `pdfUrl` points to the PDF to be loaded:\n  ```js\n  const pdfBuffer = await fetch(pdfUrl).then((res) => res.arrayBuffer());\n  const pdfDoc = await PDFDocument.load(pdfBuffer);\n  ```\n\n- The purpose of making these methods asynchronous is to avoid blocking the event loop (especially for browser-based usage). If you aren't running this code client-side and are not concerned about blocking the event loop, you can speed up parsing times with:\n\n  ```js\n  PDFDocument.load(..., { parseSpeed: ParseSpeeds.Fastest })\n  ```\n\n  You can do a similar thing for save:\n\n  ```js\n  PDFDocument.save({ objectsPerTick: Infinity });\n  ```\n\n- To draw content on a page in old versions of `pdf-lib`, you needed to create a content stream, invoke some operators, register the content stream, and add it to the document. Something like the following:\n\n  ```js\n  const contentStream = pdfDoc.createContentStream(\n    drawText(\n      timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'),\n      {\n        x: 50,\n        y: 450,\n        size: 15,\n        font: 'TimesRoman',\n        colorRgb: [0, 0.53, 0.71],\n      },\n    ),\n  );\n  page.addContentStreams(pdfDoc.register(contentStream));\n  ```\n\n  However, in new versions of `pdf-lib`, this is much simpler. You simply invoke drawing methods on the page, such as [`PDFPage.drawText`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawtext), [`PDFPage.drawImage`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawimage), [`PDFPage.drawRectangle`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawrectangle), or [`PDFPage.drawSvgPath`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawsvgpath). So the above example becomes:\n\n  ```js\n  page.drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: timesRomanFont,\n    color: rgb(0, 0.53, 0.71),\n  });\n  ```\n\n  Please see the [Usage Examples](#usage-examples) for more in depth examples of drawing content on a page in the new versions of `pdf-lib`. You may also find the [Complete Examples](#complete-examples) to be a useful reference.\n\n- Change _`getMaybe`_ function calls to **`get`** calls. If a property doesn't exist, then `undefined` will be returned. Note, however, that PDF name strings with need to be wrapped in `PDFName.of(...)`. For example, to look up the AcroForm object you'll need to change _`pdfDoc.catalog.getMaybe('AcroForm')`_ to **`pdfDoc.catalog.get(PDFName.of('AcroForm'))`**.\n\n  ```js\n  const acroForm = await pdfDoc.context.lookup(\n    pdfDoc.catalog.get(PDFName.of('AcroForm')),\n  );\n  ```\n\n  > v0.x.x converted the strings passed to `get` and `getMaybe` to `PDFName` objects, but v1.0.0 does not do this conversion for you. So you must always pass actual `PDFName` objects instead of strings.\n\n- To find the AcroForm field references now becomes:\n  ```js\n  const acroFieldRefs = await pdfDoc.context.lookup(\n    acroForm.get(PDFName.of('Fields')),\n  );\n  ```\n- To add a new page replace _`pdfDoc.createPage([width, height])`_ with **`pdfDoc.addPage([width, height])`**\n  ```js\n  const page = pdfDoc.addPage([500, 750]);\n  ```\n  or simply:\n  ```js\n  const page = pdfDoc.addPage();\n  ```\n\n* To get the size of the page:\n\n  ```js\n  const { width, height } = page.getSize();\n  page.getWidth();\n  page.getHeight();\n  ```\n\n* To add images replace _`pdfDoc.embedPNG`_ with **`pdfDoc.embedPng`** and _`pdfDoc.embedJPG`_ with **`pdfDoc.embedJpg`**\n\n* The `pdfDoc.embedPng` and `pdfDoc.embedJpg` methods now return `PDFImage` objects which have the width and height of the image as properties. You can also scale down the width and height by a constant factor using the `PDFImage.scale` method:\n  ```js\n  const aBigImage = await pdfDoc.embedPng(aBigImageBytes);\n  const { width, height } = aBigImage.scale(0.25);\n  ```\n  So, `const [image, dims] = pdfDoc.embedJPG(mediaBuffer)` becomes:\n  ```js\n  const image = await pdfDoc.embedJpg(mediaBuffer);\n  // image.width, image.height can be used instead of the dims object.\n  ```\n* To save the PDF replace _`PDFDocumentWriter.saveToBytes(pdfDoc)`_ with **`pdfDoc.save()`**\n\n  ```js\n  const pdfDocBytes = await pdfDoc.save();\n  ```\n\n* To display the saved PDF now becomes:\n\n  ```js\n  const pdfUrl = URL.createObjectURL(\n    new Blob([await pdfDoc.save()], { type: 'application/pdf' }),\n  );\n  window.open(pdfUrl, '_blank');\n  ```\n\n  (note: `URL.revokeObjectURL` should be called later to free up memory)\n\n* To get the PDF page count:\n\n  ```js\n  pdfDoc.getPages().length;\n  ```\n\n* To copy pages from one document to another you must now call **`destPdf.copyPages(srcPdf, srcPageIndexesArray)`** to copy pages. You can see an example of this in the [Copy Pages](#copy-pages) usage example. Admittedly, this API is slightly less ergonomic than what exists in v0.x.x, but it has two key benefits:\n\n  1. It avoids making PDFDocument.addPage and PDFDocument.insertPage async.\n     When copying multiple pages from the source document, the resulting merged document should have a smaller file size. This is because the page copying API that exists in v0.x.x was intended for copying just one or two pages.\n\n  2. When copying large numbers of pages, it could result in redundant objects being created. This new page copying API should eliminate that.\n\n  ```js\n  async function mergePdfs(pdfsToMerge: string[]) {\n    const mergedPdf = await PDFDocument.create();\n    for (const pdfCopyDoc of pdfsToMerge) {\n      const pdfBytes = fs.readFileSync(pdfCopyDoc);\n      const pdf = await PDFDocument.load(pdfBytes);\n      const copiedPages = await mergedPdf.copyPages(pdf, pdf.getPageIndices());\n      copiedPages.forEach((page) => {\n        mergedPdf.addPage(page);\n      });\n    }\n    const mergedPdfFile = await mergedPdf.save();\n    return mergedPdfFile;\n  }\n  ```\n\n* If required, you can retrieve the CropBox or MediaBox of a page like so:\n  ```js\n  const cropBox = page.node.CropBox() || page.node.MediaBox();\n  ```\n\n## Contributing\n\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine. (We try to make this as simple and fast as possible! :rocket:)\n\n## Tutorials and Cool Stuff\n\n- [Möbius Printing helper](https://shreevatsa.net/mobius-print/) - a tool created by @shreevatsa\n- [How to use pdf-lib in AWS Lambdas](https://medium.com/swlh/create-pdf-using-pdf-lib-on-serverless-aws-lambda-e9506246dc88) - a tutorial written by Crespo Wang\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.5.0","dist":{"shasum":"858b9b4641d8ba5e721bc6f7e62a386efdacd4fa","integrity":"sha512-ZpMB7AY7JxvhAAaz/YS0J67Con+ks63h9GWSTHbul46mg1j35pfz6LN/xNGiwoMM19PjaxTbtuhNQAePIyKyRA==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.5.0.tgz","fileCount":1115,"unpackedSize":8404677,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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href=\"https://pdf-lib.js.org\">\n<h1 align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n</a>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<br />\n\n> **Learn more at [pdf-lib.js.org](https://pdf-lib.js.org)**\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed PDF Pages](#embed-pdf-pages)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n  - [Set Document Metadata](#set-document-metadata)\n  - [Read Document Metadata](#read-document-metadata)\n  - [Draw SVG Paths](#draw-svg-paths)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Documentation](#documentation)\n- [Encryption Handling](#encryption-handling)\n- [Migrating to v1.0.0](#migrating-to-v1)\n- [Contributing](#contributing)\n- [Tutorials and Cool Stuff](#tutorials-and-cool-stuff)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw PDF Pages\n- Draw Vector Graphics\n- Draw SVG Paths\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n- Set document metadata\n- Read document metadata\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rxwsc8f5/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/64zajhge/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/ybank8s9/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PDF Pages\n\n_This example produces [this PDF](assets/pdfs/examples/embed_pdf_pages.pdf)_ (when [this PDF](assets/pdfs/american_flag.pdf) is used for the `americanFlagPdfBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `usConstitutionPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/Lyb16ocj/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst americanFlagPdfBytes = ...\nconst usConstitutionPdfBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the American flag PDF bytes\nconst [americanFlag] = await pdfDoc.embedPdf(americanFlagPdfBytes)\n\n// Load the U.S. constitution PDF bytes\nconst usConstitutionPdf = await PDFDocument.load(usConstitutionPdfBytes)\n\n// Embed the second page of the constitution and clip the preamble\nconst preamble = await pdfDoc.embedPage(usConstitutionPdf.getPages()[1], {\n  left: 55,\n  bottom: 485,\n  right: 300,\n  top: 575,\n})\n\n// Get the width/height of the American flag PDF scaled down to 30% of \n// its original size\nconst americanFlagDims = americanFlag.scale(0.3)\n\n// Get the width/height of the preamble clipping scaled up to 225% of \n// its original size\nconst preambleDims = preamble.scale(2.25)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the American flag image in the center top of the page\npage.drawPage(americanFlag, {\n  ...americanFlagDims,\n  x: page.getWidth() / 2 - americanFlagDims.width / 2,\n  y: page.getHeight() - americanFlagDims.height - 150,\n})\n\n// Draw the preamble clipping in the center bottom of the page\npage.drawPage(preamble, {\n  ...preambleDims,\n  x: page.getWidth() / 2 - preambleDims.width / 2,\n  y: page.getHeight() / 2 - preambleDims.height / 2 - 50,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rgu6ca59/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If you're running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Set Document Metadata\n\n_This example produces [this PDF](assets/pdfs/examples/set_document_metadata.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/vcwmfnbe/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available metadata fields on the PDFDocument. Note that these fields\n// are visible in the \"Document Properties\" section of most PDF readers.\npdfDoc.setTitle('🥚 The Life of an Egg 🍳')\npdfDoc.setAuthor('Humpty Dumpty')\npdfDoc.setSubject('📘 An Epic Tale of Woe 📖')\npdfDoc.setKeywords(['eggs', 'wall', 'fall', 'king', 'horses', 'men'])\npdfDoc.setProducer('PDF App 9000 🤖')\npdfDoc.setCreator('pdf-lib (https://github.com/Hopding/pdf-lib)')\npdfDoc.setCreationDate(new Date('2018-06-24T01:58:37.228Z'))\npdfDoc.setModificationDate(new Date('2019-12-21T07:00:11.000Z'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Read Document Metadata\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/eg8rfz3k/16/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument without updating its existing metadata\nconst pdfDoc = await PDFDocument.load(existingPdfBytes, { \n  updateMetadata: false \n})\n\n// Print all available metadata fields\nconsole.log('Title:', pdfDoc.getTitle())\nconsole.log('Author:', pdfDoc.getAuthor())\nconsole.log('Subject:', pdfDoc.getSubject())\nconsole.log('Creator:', pdfDoc.getCreator())\nconsole.log('Keywords:', pdfDoc.getKeywords())\nconsole.log('Producer:', pdfDoc.getProducer())\nconsole.log('Creation Date:', pdfDoc.getCreationDate())\nconsole.log('Modification Date:', pdfDoc.getModificationDate())\n```\n\nThis script outputs the following (_when [this PDF](assets/pdfs/with_cropbox.pdf) is used for the `existingPdfBytes` variable_):\n\n```\nTitle: Microsoft Word - Basic Curriculum Vitae example.doc\nAuthor: Administrator\nSubject: undefined\nCreator: PScript5.dll Version 5.2\nKeywords: undefined\nProducer: Acrobat Distiller 8.1.0 (Windows)\nCreation Date: 2010-07-29T14:26:00.000Z\nModification Date: 2010-07-29T14:26:00.000Z\n```\n\n### Draw SVG Paths\n\n_This example produces [this PDF](assets/pdfs/examples/draw_svg_paths.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bwaomr9h/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\n\n// SVG path for a wavy line\nconst svgPath =\n  'M 0,20 L 100,160 Q 130,200 150,120 C 190,-40 200,200 300,150 L 400,90'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\npage.moveTo(100, page.getHeight() - 5)\n\n// Draw the SVG path as a black line\npage.moveDown(25)\npage.drawSvgPath(svgPath)\n\n// Draw the SVG path as a thick green line\npage.moveDown(200)\npage.drawSvgPath(svgPath, { borderColor: rgb(0, 1, 0), borderWidth: 5 })\n\n// Draw the SVG path and fill it with red\npage.moveDown(200)\npage.drawSvgPath(svgPath, { color: rgb(1, 0, 0) })\n\n// Draw the SVG path at 50% of its original size\npage.moveDown(200)\npage.drawSvgPath(svgPath, { scale: 0.5 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently three apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n- [**`rn`**](apps/rn) - contains [tests](apps/rn/src/tests/) for `pdf-lib` in React Native environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a React Native environment.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/) or [jsDelivr](https://www.jsdelivr.com/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/pdf-lib@1.4.0/dist/pdf-lib.min.js\n> - https://cdn.jsdelivr.net/npm/pdf-lib@1.4.0/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\nconst pdfDoc = await PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n> - https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n## Documentation\n\nAPI documentation is available on the project site at https://pdf-lib.js.org/docs/api/.\n\nThe repo for the project site (and generated documentation files) is\nlocated here: https://github.com/Hopding/pdf-lib-docs.\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n<h2 id=\"migrating-to-v1\">Migrating to v1.0.0</h2>\n\nThe latest release of `pdf-lib` (`v1.0.0`) includes several breaking API changes. If you have code written for older versions of `pdf-lib` (`v0.x.x`), you can use the following instructions to help migrate your code to v1.0.0.\n\nNote that many of the API methods are now asynchronous and return promises, so you'll need to `await` on them (or use promise chaining: `.then(res => ...)`).\n\n- Rename _`PDFDocumentFactory`_ to **`PDFDocument`**. `PDFDocument.create` and `PDFDocument.load` are now async (they return promises), so you'll need to `await` on them.\n\n* To create a new PDF document:\n\n  ```js\n  const pdfDoc = await PDFDocument.create();\n  ```\n\n* To retrieve and load a PDF where `pdfUrl` points to the PDF to be loaded:\n  ```js\n  const pdfBuffer = await fetch(pdfUrl).then((res) => res.arrayBuffer());\n  const pdfDoc = await PDFDocument.load(pdfBuffer);\n  ```\n\n- The purpose of making these methods asynchronous is to avoid blocking the event loop (especially for browser-based usage). If you aren't running this code client-side and are not concerned about blocking the event loop, you can speed up parsing times with:\n\n  ```js\n  PDFDocument.load(..., { parseSpeed: ParseSpeeds.Fastest })\n  ```\n\n  You can do a similar thing for save:\n\n  ```js\n  PDFDocument.save({ objectsPerTick: Infinity });\n  ```\n\n- To draw content on a page in old versions of `pdf-lib`, you needed to create a content stream, invoke some operators, register the content stream, and add it to the document. Something like the following:\n\n  ```js\n  const contentStream = pdfDoc.createContentStream(\n    drawText(\n      timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'),\n      {\n        x: 50,\n        y: 450,\n        size: 15,\n        font: 'TimesRoman',\n        colorRgb: [0, 0.53, 0.71],\n      },\n    ),\n  );\n  page.addContentStreams(pdfDoc.register(contentStream));\n  ```\n\n  However, in new versions of `pdf-lib`, this is much simpler. You simply invoke drawing methods on the page, such as [`PDFPage.drawText`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawtext), [`PDFPage.drawImage`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawimage), [`PDFPage.drawRectangle`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawrectangle), or [`PDFPage.drawSvgPath`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawsvgpath). So the above example becomes:\n\n  ```js\n  page.drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: timesRomanFont,\n    color: rgb(0, 0.53, 0.71),\n  });\n  ```\n\n  Please see the [Usage Examples](#usage-examples) for more in depth examples of drawing content on a page in the new versions of `pdf-lib`. You may also find the [Complete Examples](#complete-examples) to be a useful reference.\n\n- Change _`getMaybe`_ function calls to **`get`** calls. If a property doesn't exist, then `undefined` will be returned. Note, however, that PDF name strings with need to be wrapped in `PDFName.of(...)`. For example, to look up the AcroForm object you'll need to change _`pdfDoc.catalog.getMaybe('AcroForm')`_ to **`pdfDoc.catalog.get(PDFName.of('AcroForm'))`**.\n\n  ```js\n  const acroForm = await pdfDoc.context.lookup(\n    pdfDoc.catalog.get(PDFName.of('AcroForm')),\n  );\n  ```\n\n  > v0.x.x converted the strings passed to `get` and `getMaybe` to `PDFName` objects, but v1.0.0 does not do this conversion for you. So you must always pass actual `PDFName` objects instead of strings.\n\n- To find the AcroForm field references now becomes:\n  ```js\n  const acroFieldRefs = await pdfDoc.context.lookup(\n    acroForm.get(PDFName.of('Fields')),\n  );\n  ```\n- To add a new page replace _`pdfDoc.createPage([width, height])`_ with **`pdfDoc.addPage([width, height])`**\n  ```js\n  const page = pdfDoc.addPage([500, 750]);\n  ```\n  or simply:\n  ```js\n  const page = pdfDoc.addPage();\n  ```\n\n* To get the size of the page:\n\n  ```js\n  const { width, height } = page.getSize();\n  page.getWidth();\n  page.getHeight();\n  ```\n\n* To add images replace _`pdfDoc.embedPNG`_ with **`pdfDoc.embedPng`** and _`pdfDoc.embedJPG`_ with **`pdfDoc.embedJpg`**\n\n* The `pdfDoc.embedPng` and `pdfDoc.embedJpg` methods now return `PDFImage` objects which have the width and height of the image as properties. You can also scale down the width and height by a constant factor using the `PDFImage.scale` method:\n  ```js\n  const aBigImage = await pdfDoc.embedPng(aBigImageBytes);\n  const { width, height } = aBigImage.scale(0.25);\n  ```\n  So, `const [image, dims] = pdfDoc.embedJPG(mediaBuffer)` becomes:\n  ```js\n  const image = await pdfDoc.embedJpg(mediaBuffer);\n  // image.width, image.height can be used instead of the dims object.\n  ```\n* To save the PDF replace _`PDFDocumentWriter.saveToBytes(pdfDoc)`_ with **`pdfDoc.save()`**\n\n  ```js\n  const pdfDocBytes = await pdfDoc.save();\n  ```\n\n* To display the saved PDF now becomes:\n\n  ```js\n  const pdfUrl = URL.createObjectURL(\n    new Blob([await pdfDoc.save()], { type: 'application/pdf' }),\n  );\n  window.open(pdfUrl, '_blank');\n  ```\n\n  (note: `URL.revokeObjectURL` should be called later to free up memory)\n\n* To get the PDF page count:\n\n  ```js\n  pdfDoc.getPages().length;\n  ```\n\n* To copy pages from one document to another you must now call **`destPdf.copyPages(srcPdf, srcPageIndexesArray)`** to copy pages. You can see an example of this in the [Copy Pages](#copy-pages) usage example. Admittedly, this API is slightly less ergonomic than what exists in v0.x.x, but it has two key benefits:\n\n  1. It avoids making PDFDocument.addPage and PDFDocument.insertPage async.\n     When copying multiple pages from the source document, the resulting merged document should have a smaller file size. This is because the page copying API that exists in v0.x.x was intended for copying just one or two pages.\n\n  2. When copying large numbers of pages, it could result in redundant objects being created. This new page copying API should eliminate that.\n\n  ```js\n  async function mergePdfs(pdfsToMerge: string[]) {\n    const mergedPdf = await PDFDocument.create();\n    for (const pdfCopyDoc of pdfsToMerge) {\n      const pdfBytes = fs.readFileSync(pdfCopyDoc);\n      const pdf = await PDFDocument.load(pdfBytes);\n      const copiedPages = await mergedPdf.copyPages(pdf, pdf.getPageIndices());\n      copiedPages.forEach((page) => {\n        mergedPdf.addPage(page);\n      });\n    }\n    const mergedPdfFile = await mergedPdf.save();\n    return mergedPdfFile;\n  }\n  ```\n\n* If required, you can retrieve the CropBox or MediaBox of a page like so:\n  ```js\n  const cropBox = page.node.CropBox() || page.node.MediaBox();\n  ```\n\n## Contributing\n\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine. (We try to make this as simple and fast as possible! :rocket:)\n\n## Tutorials and Cool Stuff\n\n- [Möbius Printing helper](https://shreevatsa.net/mobius-print/) - a tool created by @shreevatsa\n- [Extract PDF pages](https://shreevatsa.net/pdf-pages/) - a tool created by @shreevatsa\n- [Travel certificate generator](https://github.com/LAB-MI/deplacement-covid-19) - a tool that creates travel certificates for French citizens under quarantine due to COVID-19\n- [How to use pdf-lib in AWS Lambdas](https://medium.com/swlh/create-pdf-using-pdf-lib-on-serverless-aws-lambda-e9506246dc88) - a tutorial written by Crespo Wang\n- [Working With PDFs in Node.js Using pdf-lib](http://thecodebarbarian.com/working-with-pdfs-in-node-js.html) - a tutorial by Valeri Karpov\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.5.1-rc1","dist":{"shasum":"7226c6390d220d54e5c5e12c2bdebd78153ca9ab","integrity":"sha512-mXIcBlsSmkS/WugygyCpmpvtomXvoDGHN0lXWNfHHMABxWppSoMRG+pdDa+qwM2wZ0pNJrkrMCNI7q/OGbsbWQ==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.5.1-rc1.tgz","fileCount":1115,"unpackedSize":8403563,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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--eval 'console.log(require(`./package.json`).version)'","clean":"rimraf ts3.4 build cjs dist es scratchpad/build coverage tsBuildInfo.json isolate*.log flamegraph.html out.pdf","typecheck":"tsc --noEmit --incremental false --tsBuildInfoFile null","test":"jest --config jest.json --runInBand","testw":"jest --config jest.json --watch","testc":"jest --config jest.json --coverage && open coverage/index.html","lint":"yarn lint:prettier && yarn lint:tslint:src && yarn lint:tslint:tests","lint:tslint:src":"tslint --project tsconfig.json --fix","lint:tslint:tests":"tslint --project tests/tsconfig.json --fix","lint:prettier":"prettier --write \"./{src,tests}/**/*.{ts,js,json}\" --loglevel error","build":"yarn build:cjs && yarn build:es && yarn build:umd && yarn build:umd:min && yarn build:downlevel-dts","build:cjs":"ttsc --module commonjs --outDir cjs","build:es":"ttsc --module ES2015 --outDir es","build:umd":"rollup --config rollup.config.js --file dist/pdf-lib.js","build:umd:min":"rollup --config rollup.config.js --file dist/pdf-lib.min.js --environment MINIFY","build:downlevel-dts":"rimraf ts3.4 && yarn downlevel-dts . ts3.4 && rimraf ts3.4/scratchpad","scratchpad:start":"ttsc --build scratchpad/tsconfig.json --watch","scratchpad:run":"node scratchpad/build/scratchpad/index.js","scratchpad:flame":"rimraf isolate*.log && node --prof scratchpad/build/scratchpad/index.js && node --prof-process --preprocess -j isolate*.log | flamebearer","apps:node":"ttsc --build apps/node/tsconfig.json && node apps/node-build/index.js","apps:web":"http-server -c-1 .","apps:web:mac":"bash -c 'sleep 1 && open http://localhost:8080/apps/web/test1.html' & yarn apps:web","apps:rn:ios":"cd apps/rn && yarn add ./../.. --force && react-native run-ios","apps:rn:android":"yarn apps:rn:emulator & cd apps/rn && yarn add ./../.. --force && react-native run-android","apps:rn:emulator":"emulator -avd \"$(emulator -list-avds | head -n 1)\" & bash -c 'sleep 5 && adb reverse tcp:8080 tcp:8080 && adb 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tcp:8081'"},"main":"cjs/index.js","module":"es/index.js","unpkg":"dist/pdf-lib.min.js","types":"cjs/index.d.ts","typesVersions":{"<=3.5":{"*":["ts3.4/*"]}},"dependencies":{"@pdf-lib/standard-fonts":"^0.0.4","@pdf-lib/upng":"^1.0.1","pako":"^1.0.11","tslib":"^1.11.1"},"devDependencies":{"@pdf-lib/fontkit":"^0.0.4","@rollup/plugin-commonjs":"^11.1.0","@rollup/plugin-json":"^4.0.3","@rollup/plugin-node-resolve":"^7.1.3","@types/jest":"^25.2.1","@types/node-fetch":"^2.5.7","@types/pako":"^1.0.1","@zerollup/ts-transform-paths":"^1.7.17","downlevel-dts":"^0.4.0","flamebearer":"^1.1.3","http-server":"^0.12.1","jest":"^25.4.0","node-fetch":"^2.6.0","prettier":"^2.0.5","rimraf":"^3.0.2","rollup":"^1.32.1","rollup-plugin-terser":"^5.3.0","ts-jest":"^25.4.0","tslint":"^6.1.1","tslint-config-prettier":"^1.18.0","ttypescript":"^1.5.10","typescript":"^3.8.3"},"resolutions":{"jest/**/set-value":"^2.0.1"},"license":"MIT","private":false,"homepage":"https://pdf-lib.js.org/","repository":{"type":"git","url":"git+https://github.com/Hopding/pdf-lib.git"},"bugs":{"url":"https://github.com/Hopding/pdf-lib/issues"},"keywords":["pdf-lib","pdf","document","create","modify","creation","modification","edit","editing","typescript","javascript","library"],"readmeFilename":"README.md","readme":"<a href=\"https://pdf-lib.js.org\">\n<h1 align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n</a>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<br />\n\n> **Learn more at [pdf-lib.js.org](https://pdf-lib.js.org)**\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed PDF Pages](#embed-pdf-pages)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n  - [Set Document Metadata](#set-document-metadata)\n  - [Read Document Metadata](#read-document-metadata)\n  - [Draw SVG Paths](#draw-svg-paths)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Documentation](#documentation)\n- [Encryption Handling](#encryption-handling)\n- [Migrating to v1.0.0](#migrating-to-v1)\n- [Contributing](#contributing)\n- [Tutorials and Cool Stuff](#tutorials-and-cool-stuff)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw PDF Pages\n- Draw Vector Graphics\n- Draw SVG Paths\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n- Set document metadata\n- Read document metadata\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rxwsc8f5/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/64zajhge/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/ybank8s9/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PDF Pages\n\n_This example produces [this PDF](assets/pdfs/examples/embed_pdf_pages.pdf)_ (when [this PDF](assets/pdfs/american_flag.pdf) is used for the `americanFlagPdfBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `usConstitutionPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/Lyb16ocj/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst americanFlagPdfBytes = ...\nconst usConstitutionPdfBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the American flag PDF bytes\nconst [americanFlag] = await pdfDoc.embedPdf(americanFlagPdfBytes)\n\n// Load the U.S. constitution PDF bytes\nconst usConstitutionPdf = await PDFDocument.load(usConstitutionPdfBytes)\n\n// Embed the second page of the constitution and clip the preamble\nconst preamble = await pdfDoc.embedPage(usConstitutionPdf.getPages()[1], {\n  left: 55,\n  bottom: 485,\n  right: 300,\n  top: 575,\n})\n\n// Get the width/height of the American flag PDF scaled down to 30% of \n// its original size\nconst americanFlagDims = americanFlag.scale(0.3)\n\n// Get the width/height of the preamble clipping scaled up to 225% of \n// its original size\nconst preambleDims = preamble.scale(2.25)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the American flag image in the center top of the page\npage.drawPage(americanFlag, {\n  ...americanFlagDims,\n  x: page.getWidth() / 2 - americanFlagDims.width / 2,\n  y: page.getHeight() - americanFlagDims.height - 150,\n})\n\n// Draw the preamble clipping in the center bottom of the page\npage.drawPage(preamble, {\n  ...preambleDims,\n  x: page.getWidth() / 2 - preambleDims.width / 2,\n  y: page.getHeight() / 2 - preambleDims.height / 2 - 50,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rgu6ca59/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If you're running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Set Document Metadata\n\n_This example produces [this PDF](assets/pdfs/examples/set_document_metadata.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/vcwmfnbe/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available metadata fields on the PDFDocument. Note that these fields\n// are visible in the \"Document Properties\" section of most PDF readers.\npdfDoc.setTitle('🥚 The Life of an Egg 🍳')\npdfDoc.setAuthor('Humpty Dumpty')\npdfDoc.setSubject('📘 An Epic Tale of Woe 📖')\npdfDoc.setKeywords(['eggs', 'wall', 'fall', 'king', 'horses', 'men'])\npdfDoc.setProducer('PDF App 9000 🤖')\npdfDoc.setCreator('pdf-lib (https://github.com/Hopding/pdf-lib)')\npdfDoc.setCreationDate(new Date('2018-06-24T01:58:37.228Z'))\npdfDoc.setModificationDate(new Date('2019-12-21T07:00:11.000Z'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Read Document Metadata\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/eg8rfz3k/16/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument without updating its existing metadata\nconst pdfDoc = await PDFDocument.load(existingPdfBytes, { \n  updateMetadata: false \n})\n\n// Print all available metadata fields\nconsole.log('Title:', pdfDoc.getTitle())\nconsole.log('Author:', pdfDoc.getAuthor())\nconsole.log('Subject:', pdfDoc.getSubject())\nconsole.log('Creator:', pdfDoc.getCreator())\nconsole.log('Keywords:', pdfDoc.getKeywords())\nconsole.log('Producer:', pdfDoc.getProducer())\nconsole.log('Creation Date:', pdfDoc.getCreationDate())\nconsole.log('Modification Date:', pdfDoc.getModificationDate())\n```\n\nThis script outputs the following (_when [this PDF](assets/pdfs/with_cropbox.pdf) is used for the `existingPdfBytes` variable_):\n\n```\nTitle: Microsoft Word - Basic Curriculum Vitae example.doc\nAuthor: Administrator\nSubject: undefined\nCreator: PScript5.dll Version 5.2\nKeywords: undefined\nProducer: Acrobat Distiller 8.1.0 (Windows)\nCreation Date: 2010-07-29T14:26:00.000Z\nModification Date: 2010-07-29T14:26:00.000Z\n```\n\n### Draw SVG Paths\n\n_This example produces [this PDF](assets/pdfs/examples/draw_svg_paths.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bwaomr9h/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\n\n// SVG path for a wavy line\nconst svgPath =\n  'M 0,20 L 100,160 Q 130,200 150,120 C 190,-40 200,200 300,150 L 400,90'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\npage.moveTo(100, page.getHeight() - 5)\n\n// Draw the SVG path as a black line\npage.moveDown(25)\npage.drawSvgPath(svgPath)\n\n// Draw the SVG path as a thick green line\npage.moveDown(200)\npage.drawSvgPath(svgPath, { borderColor: rgb(0, 1, 0), borderWidth: 5 })\n\n// Draw the SVG path and fill it with red\npage.moveDown(200)\npage.drawSvgPath(svgPath, { color: rgb(1, 0, 0) })\n\n// Draw the SVG path at 50% of its original size\npage.moveDown(200)\npage.drawSvgPath(svgPath, { scale: 0.5 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently three apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n- [**`rn`**](apps/rn) - contains [tests](apps/rn/src/tests/) for `pdf-lib` in React Native environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a React Native environment.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/) or [jsDelivr](https://www.jsdelivr.com/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/pdf-lib@1.4.0/dist/pdf-lib.min.js\n> - https://cdn.jsdelivr.net/npm/pdf-lib@1.4.0/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\nconst pdfDoc = await PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n> - https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n## Documentation\n\nAPI documentation is available on the project site at https://pdf-lib.js.org/docs/api/.\n\nThe repo for the project site (and generated documentation files) is\nlocated here: https://github.com/Hopding/pdf-lib-docs.\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n<h2 id=\"migrating-to-v1\">Migrating to v1.0.0</h2>\n\nThe latest release of `pdf-lib` (`v1.0.0`) includes several breaking API changes. If you have code written for older versions of `pdf-lib` (`v0.x.x`), you can use the following instructions to help migrate your code to v1.0.0.\n\nNote that many of the API methods are now asynchronous and return promises, so you'll need to `await` on them (or use promise chaining: `.then(res => ...)`).\n\n- Rename _`PDFDocumentFactory`_ to **`PDFDocument`**. `PDFDocument.create` and `PDFDocument.load` are now async (they return promises), so you'll need to `await` on them.\n\n* To create a new PDF document:\n\n  ```js\n  const pdfDoc = await PDFDocument.create();\n  ```\n\n* To retrieve and load a PDF where `pdfUrl` points to the PDF to be loaded:\n  ```js\n  const pdfBuffer = await fetch(pdfUrl).then((res) => res.arrayBuffer());\n  const pdfDoc = await PDFDocument.load(pdfBuffer);\n  ```\n\n- The purpose of making these methods asynchronous is to avoid blocking the event loop (especially for browser-based usage). If you aren't running this code client-side and are not concerned about blocking the event loop, you can speed up parsing times with:\n\n  ```js\n  PDFDocument.load(..., { parseSpeed: ParseSpeeds.Fastest })\n  ```\n\n  You can do a similar thing for save:\n\n  ```js\n  PDFDocument.save({ objectsPerTick: Infinity });\n  ```\n\n- To draw content on a page in old versions of `pdf-lib`, you needed to create a content stream, invoke some operators, register the content stream, and add it to the document. Something like the following:\n\n  ```js\n  const contentStream = pdfDoc.createContentStream(\n    drawText(\n      timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'),\n      {\n        x: 50,\n        y: 450,\n        size: 15,\n        font: 'TimesRoman',\n        colorRgb: [0, 0.53, 0.71],\n      },\n    ),\n  );\n  page.addContentStreams(pdfDoc.register(contentStream));\n  ```\n\n  However, in new versions of `pdf-lib`, this is much simpler. You simply invoke drawing methods on the page, such as [`PDFPage.drawText`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawtext), [`PDFPage.drawImage`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawimage), [`PDFPage.drawRectangle`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawrectangle), or [`PDFPage.drawSvgPath`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawsvgpath). So the above example becomes:\n\n  ```js\n  page.drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: timesRomanFont,\n    color: rgb(0, 0.53, 0.71),\n  });\n  ```\n\n  Please see the [Usage Examples](#usage-examples) for more in depth examples of drawing content on a page in the new versions of `pdf-lib`. You may also find the [Complete Examples](#complete-examples) to be a useful reference.\n\n- Change _`getMaybe`_ function calls to **`get`** calls. If a property doesn't exist, then `undefined` will be returned. Note, however, that PDF name strings with need to be wrapped in `PDFName.of(...)`. For example, to look up the AcroForm object you'll need to change _`pdfDoc.catalog.getMaybe('AcroForm')`_ to **`pdfDoc.catalog.get(PDFName.of('AcroForm'))`**.\n\n  ```js\n  const acroForm = await pdfDoc.context.lookup(\n    pdfDoc.catalog.get(PDFName.of('AcroForm')),\n  );\n  ```\n\n  > v0.x.x converted the strings passed to `get` and `getMaybe` to `PDFName` objects, but v1.0.0 does not do this conversion for you. So you must always pass actual `PDFName` objects instead of strings.\n\n- To find the AcroForm field references now becomes:\n  ```js\n  const acroFieldRefs = await pdfDoc.context.lookup(\n    acroForm.get(PDFName.of('Fields')),\n  );\n  ```\n- To add a new page replace _`pdfDoc.createPage([width, height])`_ with **`pdfDoc.addPage([width, height])`**\n  ```js\n  const page = pdfDoc.addPage([500, 750]);\n  ```\n  or simply:\n  ```js\n  const page = pdfDoc.addPage();\n  ```\n\n* To get the size of the page:\n\n  ```js\n  const { width, height } = page.getSize();\n  page.getWidth();\n  page.getHeight();\n  ```\n\n* To add images replace _`pdfDoc.embedPNG`_ with **`pdfDoc.embedPng`** and _`pdfDoc.embedJPG`_ with **`pdfDoc.embedJpg`**\n\n* The `pdfDoc.embedPng` and `pdfDoc.embedJpg` methods now return `PDFImage` objects which have the width and height of the image as properties. You can also scale down the width and height by a constant factor using the `PDFImage.scale` method:\n  ```js\n  const aBigImage = await pdfDoc.embedPng(aBigImageBytes);\n  const { width, height } = aBigImage.scale(0.25);\n  ```\n  So, `const [image, dims] = pdfDoc.embedJPG(mediaBuffer)` becomes:\n  ```js\n  const image = await pdfDoc.embedJpg(mediaBuffer);\n  // image.width, image.height can be used instead of the dims object.\n  ```\n* To save the PDF replace _`PDFDocumentWriter.saveToBytes(pdfDoc)`_ with **`pdfDoc.save()`**\n\n  ```js\n  const pdfDocBytes = await pdfDoc.save();\n  ```\n\n* To display the saved PDF now becomes:\n\n  ```js\n  const pdfUrl = URL.createObjectURL(\n    new Blob([await pdfDoc.save()], { type: 'application/pdf' }),\n  );\n  window.open(pdfUrl, '_blank');\n  ```\n\n  (note: `URL.revokeObjectURL` should be called later to free up memory)\n\n* To get the PDF page count:\n\n  ```js\n  pdfDoc.getPages().length;\n  ```\n\n* To copy pages from one document to another you must now call **`destPdf.copyPages(srcPdf, srcPageIndexesArray)`** to copy pages. You can see an example of this in the [Copy Pages](#copy-pages) usage example. Admittedly, this API is slightly less ergonomic than what exists in v0.x.x, but it has two key benefits:\n\n  1. It avoids making PDFDocument.addPage and PDFDocument.insertPage async.\n     When copying multiple pages from the source document, the resulting merged document should have a smaller file size. This is because the page copying API that exists in v0.x.x was intended for copying just one or two pages.\n\n  2. When copying large numbers of pages, it could result in redundant objects being created. This new page copying API should eliminate that.\n\n  ```js\n  async function mergePdfs(pdfsToMerge: string[]) {\n    const mergedPdf = await PDFDocument.create();\n    for (const pdfCopyDoc of pdfsToMerge) {\n      const pdfBytes = fs.readFileSync(pdfCopyDoc);\n      const pdf = await PDFDocument.load(pdfBytes);\n      const copiedPages = await mergedPdf.copyPages(pdf, pdf.getPageIndices());\n      copiedPages.forEach((page) => {\n        mergedPdf.addPage(page);\n      });\n    }\n    const mergedPdfFile = await mergedPdf.save();\n    return mergedPdfFile;\n  }\n  ```\n\n* If required, you can retrieve the CropBox or MediaBox of a page like so:\n  ```js\n  const cropBox = page.node.CropBox() || page.node.MediaBox();\n  ```\n\n## Contributing\n\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine. (We try to make this as simple and fast as possible! :rocket:)\n\n## Tutorials and Cool Stuff\n\n- [Möbius Printing helper](https://shreevatsa.net/mobius-print/) - a tool created by @shreevatsa\n- [Extract PDF pages](https://shreevatsa.net/pdf-pages/) - a tool created by @shreevatsa\n- [Travel certificate generator](https://github.com/LAB-MI/deplacement-covid-19) - a tool that creates travel certificates for French citizens under quarantine due to COVID-19\n- [How to use pdf-lib in AWS Lambdas](https://medium.com/swlh/create-pdf-using-pdf-lib-on-serverless-aws-lambda-e9506246dc88) - a tutorial written by Crespo Wang\n- [Working With PDFs in Node.js Using pdf-lib](http://thecodebarbarian.com/working-with-pdfs-in-node-js.html) - a tutorial by Valeri Karpov\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.5.1-rc2","dist":{"shasum":"edaf334212b42fef0071e73f2fb34f48b1d2ec0a","integrity":"sha512-T1cMA9LtS2WhuzsSutBvl2JlkR3eSaojtkY39Z1LONqg3Yo7++fAVEA0kI/PmGQ+C5WcU5eiFgos/cAjEBcfWw==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.5.1-rc2.tgz","fileCount":1115,"unpackedSize":8425179,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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href=\"https://pdf-lib.js.org\">\n<h1 align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n</a>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, Deno, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n</div>\n\n<br />\n\n> **Learn more at [pdf-lib.js.org](https://pdf-lib.js.org)**\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed PDF Pages](#embed-pdf-pages)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n  - [Set Document Metadata](#set-document-metadata)\n  - [Read Document Metadata](#read-document-metadata)\n  - [Draw SVG Paths](#draw-svg-paths)\n- [Deno Usage](#deno-usage)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Documentation](#documentation)\n- [Encryption Handling](#encryption-handling)\n- [Migrating to v1.0.0](#migrating-to-v1)\n- [Contributing](#contributing)\n- [Tutorials and Cool Stuff](#tutorials-and-cool-stuff)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw PDF Pages\n- Draw Vector Graphics\n- Draw SVG Paths\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n- Set document metadata\n- Read document metadata\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rxwsc8f5/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/64zajhge/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/ybank8s9/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PDF Pages\n\n_This example produces [this PDF](assets/pdfs/examples/embed_pdf_pages.pdf)_ (when [this PDF](assets/pdfs/american_flag.pdf) is used for the `americanFlagPdfBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `usConstitutionPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/Lyb16ocj/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst americanFlagPdfBytes = ...\nconst usConstitutionPdfBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the American flag PDF bytes\nconst [americanFlag] = await pdfDoc.embedPdf(americanFlagPdfBytes)\n\n// Load the U.S. constitution PDF bytes\nconst usConstitutionPdf = await PDFDocument.load(usConstitutionPdfBytes)\n\n// Embed the second page of the constitution and clip the preamble\nconst preamble = await pdfDoc.embedPage(usConstitutionPdf.getPages()[1], {\n  left: 55,\n  bottom: 485,\n  right: 300,\n  top: 575,\n})\n\n// Get the width/height of the American flag PDF scaled down to 30% of \n// its original size\nconst americanFlagDims = americanFlag.scale(0.3)\n\n// Get the width/height of the preamble clipping scaled up to 225% of \n// its original size\nconst preambleDims = preamble.scale(2.25)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the American flag image in the center top of the page\npage.drawPage(americanFlag, {\n  ...americanFlagDims,\n  x: page.getWidth() / 2 - americanFlagDims.width / 2,\n  y: page.getHeight() - americanFlagDims.height - 150,\n})\n\n// Draw the preamble clipping in the center bottom of the page\npage.drawPage(preamble, {\n  ...preambleDims,\n  x: page.getWidth() / 2 - preambleDims.width / 2,\n  y: page.getHeight() / 2 - preambleDims.height / 2 - 50,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rgu6ca59/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If you're running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Set Document Metadata\n\n_This example produces [this PDF](assets/pdfs/examples/set_document_metadata.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/vcwmfnbe/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available metadata fields on the PDFDocument. Note that these fields\n// are visible in the \"Document Properties\" section of most PDF readers.\npdfDoc.setTitle('🥚 The Life of an Egg 🍳')\npdfDoc.setAuthor('Humpty Dumpty')\npdfDoc.setSubject('📘 An Epic Tale of Woe 📖')\npdfDoc.setKeywords(['eggs', 'wall', 'fall', 'king', 'horses', 'men'])\npdfDoc.setProducer('PDF App 9000 🤖')\npdfDoc.setCreator('pdf-lib (https://github.com/Hopding/pdf-lib)')\npdfDoc.setCreationDate(new Date('2018-06-24T01:58:37.228Z'))\npdfDoc.setModificationDate(new Date('2019-12-21T07:00:11.000Z'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Read Document Metadata\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/eg8rfz3k/16/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument without updating its existing metadata\nconst pdfDoc = await PDFDocument.load(existingPdfBytes, { \n  updateMetadata: false \n})\n\n// Print all available metadata fields\nconsole.log('Title:', pdfDoc.getTitle())\nconsole.log('Author:', pdfDoc.getAuthor())\nconsole.log('Subject:', pdfDoc.getSubject())\nconsole.log('Creator:', pdfDoc.getCreator())\nconsole.log('Keywords:', pdfDoc.getKeywords())\nconsole.log('Producer:', pdfDoc.getProducer())\nconsole.log('Creation Date:', pdfDoc.getCreationDate())\nconsole.log('Modification Date:', pdfDoc.getModificationDate())\n```\n\nThis script outputs the following (_when [this PDF](assets/pdfs/with_cropbox.pdf) is used for the `existingPdfBytes` variable_):\n\n```\nTitle: Microsoft Word - Basic Curriculum Vitae example.doc\nAuthor: Administrator\nSubject: undefined\nCreator: PScript5.dll Version 5.2\nKeywords: undefined\nProducer: Acrobat Distiller 8.1.0 (Windows)\nCreation Date: 2010-07-29T14:26:00.000Z\nModification Date: 2010-07-29T14:26:00.000Z\n```\n\n### Draw SVG Paths\n\n_This example produces [this PDF](assets/pdfs/examples/draw_svg_paths.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bwaomr9h/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\n\n// SVG path for a wavy line\nconst svgPath =\n  'M 0,20 L 100,160 Q 130,200 150,120 C 190,-40 200,200 300,150 L 400,90'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\npage.moveTo(100, page.getHeight() - 5)\n\n// Draw the SVG path as a black line\npage.moveDown(25)\npage.drawSvgPath(svgPath)\n\n// Draw the SVG path as a thick green line\npage.moveDown(200)\npage.drawSvgPath(svgPath, { borderColor: rgb(0, 1, 0), borderWidth: 5 })\n\n// Draw the SVG path and fill it with red\npage.moveDown(200)\npage.drawSvgPath(svgPath, { color: rgb(1, 0, 0) })\n\n// Draw the SVG path at 50% of its original size\npage.moveDown(200)\npage.drawSvgPath(svgPath, { scale: 0.5 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Deno Usage\n\n`pdf-lib` fully supports the exciting new [Deno](https://deno.land/) runtime! All of the [usage examples](#usage-examples) work in Deno. The only thing you need to do is change the imports for `pdf-lib` and `@pdf-lib/fontkit` to use the [Pika](https://www.pika.dev/) CDN, because Deno requires all modules to be referenced via URLs.\n\n> **See also [How to Create and Modify PDF Files in Deno With pdf-lib](https://medium.com/@andrew.dillon.j/how-to-create-and-modify-pdf-files-in-deno-ffaad7099b0)**\n\n### Creating a Document with Deno\n\nBelow is the [**create document**](#create-document) example modified for Deno:\n\n```js\nimport {\n  PDFDocument,\n  StandardFonts,\n  rgb,\n} from 'https://cdn.pika.dev/pdf-lib@^1.6.0';\n\nconst pdfDoc = await PDFDocument.create();\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman);\n\nconst page = pdfDoc.addPage();\nconst { width, height } = page.getSize();\nconst fontSize = 30;\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `create-document.ts`, you can execute it using Deno with the following command:\n\n```\ndeno run --allow-write create-document.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/create_document.pdf).\n\n### Embedding a Font with Deno\n\nHere's a slightly more complicated example demonstrating how to embed a font and measure text in Deno:\n\n```js\nimport {\n  degrees,\n  PDFDocument,\n  rgb,\n  StandardFonts,\n} from 'https://cdn.pika.dev/pdf-lib@^1.6.0';\nimport fontkit from 'https://cdn.pika.dev/@pdf-lib/fontkit@^1.0.0';\n\nconst url = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf';\nconst fontBytes = await fetch(url).then((res) => res.arrayBuffer());\n\nconst pdfDoc = await PDFDocument.create();\n\npdfDoc.registerFontkit(fontkit);\nconst customFont = await pdfDoc.embedFont(fontBytes);\n\nconst page = pdfDoc.addPage();\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 35;\nconst textWidth = customFont.widthOfTextAtSize(text, textSize);\nconst textHeight = customFont.heightAtSize(textSize);\n\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n});\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `custom-font.ts`, you can execute it with the following command:\n\n```\ndeno run --allow-write --allow-net custom-font.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf).\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently four apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n- [**`rn`**](apps/rn) - contains [tests](apps/rn/src/tests/) for `pdf-lib` in React Native environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a React Native environment.\n- [**`deno`**](apps/deno) - contains [tests](apps/deno/tests/) for `pdf-lib` in Deno environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/) or [jsDelivr](https://www.jsdelivr.com/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/pdf-lib@1.4.0/dist/pdf-lib.min.js\n> - https://cdn.jsdelivr.net/npm/pdf-lib@1.4.0/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\nconst pdfDoc = await PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n> - https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n## Documentation\n\nAPI documentation is available on the project site at https://pdf-lib.js.org/docs/api/.\n\nThe repo for the project site (and generated documentation files) is\nlocated here: https://github.com/Hopding/pdf-lib-docs.\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n<h2 id=\"migrating-to-v1\">Migrating to v1.0.0</h2>\n\nThe latest release of `pdf-lib` (`v1.0.0`) includes several breaking API changes. If you have code written for older versions of `pdf-lib` (`v0.x.x`), you can use the following instructions to help migrate your code to v1.0.0.\n\nNote that many of the API methods are now asynchronous and return promises, so you'll need to `await` on them (or use promise chaining: `.then(res => ...)`).\n\n- Rename _`PDFDocumentFactory`_ to **`PDFDocument`**. `PDFDocument.create` and `PDFDocument.load` are now async (they return promises), so you'll need to `await` on them.\n\n* To create a new PDF document:\n\n  ```js\n  const pdfDoc = await PDFDocument.create();\n  ```\n\n* To retrieve and load a PDF where `pdfUrl` points to the PDF to be loaded:\n  ```js\n  const pdfBuffer = await fetch(pdfUrl).then((res) => res.arrayBuffer());\n  const pdfDoc = await PDFDocument.load(pdfBuffer);\n  ```\n\n- The purpose of making these methods asynchronous is to avoid blocking the event loop (especially for browser-based usage). If you aren't running this code client-side and are not concerned about blocking the event loop, you can speed up parsing times with:\n\n  ```js\n  PDFDocument.load(..., { parseSpeed: ParseSpeeds.Fastest })\n  ```\n\n  You can do a similar thing for save:\n\n  ```js\n  PDFDocument.save({ objectsPerTick: Infinity });\n  ```\n\n- To draw content on a page in old versions of `pdf-lib`, you needed to create a content stream, invoke some operators, register the content stream, and add it to the document. Something like the following:\n\n  ```js\n  const contentStream = pdfDoc.createContentStream(\n    drawText(\n      timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'),\n      {\n        x: 50,\n        y: 450,\n        size: 15,\n        font: 'TimesRoman',\n        colorRgb: [0, 0.53, 0.71],\n      },\n    ),\n  );\n  page.addContentStreams(pdfDoc.register(contentStream));\n  ```\n\n  However, in new versions of `pdf-lib`, this is much simpler. You simply invoke drawing methods on the page, such as [`PDFPage.drawText`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawtext), [`PDFPage.drawImage`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawimage), [`PDFPage.drawRectangle`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawrectangle), or [`PDFPage.drawSvgPath`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawsvgpath). So the above example becomes:\n\n  ```js\n  page.drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: timesRomanFont,\n    color: rgb(0, 0.53, 0.71),\n  });\n  ```\n\n  Please see the [Usage Examples](#usage-examples) for more in depth examples of drawing content on a page in the new versions of `pdf-lib`. You may also find the [Complete Examples](#complete-examples) to be a useful reference.\n\n- Change _`getMaybe`_ function calls to **`get`** calls. If a property doesn't exist, then `undefined` will be returned. Note, however, that PDF name strings with need to be wrapped in `PDFName.of(...)`. For example, to look up the AcroForm object you'll need to change _`pdfDoc.catalog.getMaybe('AcroForm')`_ to **`pdfDoc.catalog.get(PDFName.of('AcroForm'))`**.\n\n  ```js\n  const acroForm = await pdfDoc.context.lookup(\n    pdfDoc.catalog.get(PDFName.of('AcroForm')),\n  );\n  ```\n\n  > v0.x.x converted the strings passed to `get` and `getMaybe` to `PDFName` objects, but v1.0.0 does not do this conversion for you. So you must always pass actual `PDFName` objects instead of strings.\n\n- To find the AcroForm field references now becomes:\n  ```js\n  const acroFieldRefs = await pdfDoc.context.lookup(\n    acroForm.get(PDFName.of('Fields')),\n  );\n  ```\n- To add a new page replace _`pdfDoc.createPage([width, height])`_ with **`pdfDoc.addPage([width, height])`**\n  ```js\n  const page = pdfDoc.addPage([500, 750]);\n  ```\n  or simply:\n  ```js\n  const page = pdfDoc.addPage();\n  ```\n\n* To get the size of the page:\n\n  ```js\n  const { width, height } = page.getSize();\n  page.getWidth();\n  page.getHeight();\n  ```\n\n* To add images replace _`pdfDoc.embedPNG`_ with **`pdfDoc.embedPng`** and _`pdfDoc.embedJPG`_ with **`pdfDoc.embedJpg`**\n\n* The `pdfDoc.embedPng` and `pdfDoc.embedJpg` methods now return `PDFImage` objects which have the width and height of the image as properties. You can also scale down the width and height by a constant factor using the `PDFImage.scale` method:\n  ```js\n  const aBigImage = await pdfDoc.embedPng(aBigImageBytes);\n  const { width, height } = aBigImage.scale(0.25);\n  ```\n  So, `const [image, dims] = pdfDoc.embedJPG(mediaBuffer)` becomes:\n  ```js\n  const image = await pdfDoc.embedJpg(mediaBuffer);\n  // image.width, image.height can be used instead of the dims object.\n  ```\n* To save the PDF replace _`PDFDocumentWriter.saveToBytes(pdfDoc)`_ with **`pdfDoc.save()`**\n\n  ```js\n  const pdfDocBytes = await pdfDoc.save();\n  ```\n\n* To display the saved PDF now becomes:\n\n  ```js\n  const pdfUrl = URL.createObjectURL(\n    new Blob([await pdfDoc.save()], { type: 'application/pdf' }),\n  );\n  window.open(pdfUrl, '_blank');\n  ```\n\n  (note: `URL.revokeObjectURL` should be called later to free up memory)\n\n* To get the PDF page count:\n\n  ```js\n  pdfDoc.getPages().length;\n  ```\n\n* To copy pages from one document to another you must now call **`destPdf.copyPages(srcPdf, srcPageIndexesArray)`** to copy pages. You can see an example of this in the [Copy Pages](#copy-pages) usage example. Admittedly, this API is slightly less ergonomic than what exists in v0.x.x, but it has two key benefits:\n\n  1. It avoids making PDFDocument.addPage and PDFDocument.insertPage async.\n     When copying multiple pages from the source document, the resulting merged document should have a smaller file size. This is because the page copying API that exists in v0.x.x was intended for copying just one or two pages.\n\n  2. When copying large numbers of pages, it could result in redundant objects being created. This new page copying API should eliminate that.\n\n  ```js\n  async function mergePdfs(pdfsToMerge: string[]) {\n    const mergedPdf = await PDFDocument.create();\n    for (const pdfCopyDoc of pdfsToMerge) {\n      const pdfBytes = fs.readFileSync(pdfCopyDoc);\n      const pdf = await PDFDocument.load(pdfBytes);\n      const copiedPages = await mergedPdf.copyPages(pdf, pdf.getPageIndices());\n      copiedPages.forEach((page) => {\n        mergedPdf.addPage(page);\n      });\n    }\n    const mergedPdfFile = await mergedPdf.save();\n    return mergedPdfFile;\n  }\n  ```\n\n* If required, you can retrieve the CropBox or MediaBox of a page like so:\n  ```js\n  const cropBox = page.node.CropBox() || page.node.MediaBox();\n  ```\n\n## Contributing\n\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine. (We try to make this as simple and fast as possible! :rocket:)\n\n## Tutorials and Cool Stuff\n\n- [Möbius Printing helper](https://shreevatsa.net/mobius-print/) - a tool created by @shreevatsa\n- [Extract PDF pages](https://shreevatsa.net/pdf-pages/) - a tool created by @shreevatsa\n- [Travel certificate generator](https://github.com/LAB-MI/deplacement-covid-19) - a tool that creates travel certificates for French citizens under quarantine due to COVID-19\n- [How to use pdf-lib in AWS Lambdas](https://medium.com/swlh/create-pdf-using-pdf-lib-on-serverless-aws-lambda-e9506246dc88) - a tutorial written by Crespo Wang\n- [Working With PDFs in Node.js Using pdf-lib](http://thecodebarbarian.com/working-with-pdfs-in-node-js.html) - a tutorial by Valeri Karpov\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.6.1-rc1","dist":{"shasum":"6cff9de04493e76981261b8c2f04ca9f5c0941b7","integrity":"sha512-4QuNqNzeDPKJ8+yLBu17aBTPDEkrpgL5I0EUJk4TQJa7LNB4U2gNjTlgaHW+uNE/ZbeDmroX5PQIhx+1fxdszA==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.6.1-rc1.tgz","fileCount":1119,"unpackedSize":13841563,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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href=\"https://pdf-lib.js.org\">\n<h1 align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n</a>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, Deno, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n  <!-- Discord Badge -->\n  <a href=\"https://discord.gg/Y7uuVMc\">\n    <img\n      src=\"https://img.shields.io/static/v1?label=discord&message=pdf-lib&color=566fbb&style=flat-square\"\n      alt=\"Discord Badge\"\n    />\n  </a>\n</div>\n\n<br />\n\n> **Learn more at [pdf-lib.js.org](https://pdf-lib.js.org)**\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed PDF Pages](#embed-pdf-pages)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n  - [Add Attachments](#add-attachments)\n  - [Set Document Metadata](#set-document-metadata)\n  - [Read Document Metadata](#read-document-metadata)\n  - [Draw SVG Paths](#draw-svg-paths)\n- [Deno Usage](#deno-usage)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Documentation](#documentation)\n- [Help and Discussion](#help-and-discussion)\n- [Encryption Handling](#encryption-handling)\n- [Migrating to v1.0.0](#migrating-to-v1)\n- [Contributing](#contributing)\n- [Tutorials and Cool Stuff](#tutorials-and-cool-stuff)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw PDF Pages\n- Draw Vector Graphics\n- Draw SVG Paths\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n- Set document metadata\n- Read document metadata\n- Add attachments\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rxwsc8f5/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/64zajhge/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/ybank8s9/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PDF Pages\n\n_This example produces [this PDF](assets/pdfs/examples/embed_pdf_pages.pdf)_ (when [this PDF](assets/pdfs/american_flag.pdf) is used for the `americanFlagPdfBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `usConstitutionPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/Lyb16ocj/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst americanFlagPdfBytes = ...\nconst usConstitutionPdfBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the American flag PDF bytes\nconst [americanFlag] = await pdfDoc.embedPdf(americanFlagPdfBytes)\n\n// Load the U.S. constitution PDF bytes\nconst usConstitutionPdf = await PDFDocument.load(usConstitutionPdfBytes)\n\n// Embed the second page of the constitution and clip the preamble\nconst preamble = await pdfDoc.embedPage(usConstitutionPdf.getPages()[1], {\n  left: 55,\n  bottom: 485,\n  right: 300,\n  top: 575,\n})\n\n// Get the width/height of the American flag PDF scaled down to 30% of \n// its original size\nconst americanFlagDims = americanFlag.scale(0.3)\n\n// Get the width/height of the preamble clipping scaled up to 225% of \n// its original size\nconst preambleDims = preamble.scale(2.25)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the American flag image in the center top of the page\npage.drawPage(americanFlag, {\n  ...americanFlagDims,\n  x: page.getWidth() / 2 - americanFlagDims.width / 2,\n  y: page.getHeight() - americanFlagDims.height - 150,\n})\n\n// Draw the preamble clipping in the center bottom of the page\npage.drawPage(preamble, {\n  ...preambleDims,\n  x: page.getWidth() / 2 - preambleDims.width / 2,\n  y: page.getHeight() / 2 - preambleDims.height / 2 - 50,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rgu6ca59/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If you're running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Add Attachments\n\n_This example produces [this PDF](assets/pdfs/examples/add_attachments.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgAttachmentBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `pdfAttachmentBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/9snL63wj/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgAttachmentBytes = ...\nconst pdfAttachmentBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add the JPG attachment\nawait pdfDoc.attach(jpgAttachmentBytes, 'cat_riding_unicorn.jpg', {\n  mimeType: 'image/jpeg',\n  description: 'Cool cat riding a unicorn! 🦄🐈🕶️',\n  creationDate: new Date('2019/12/01'),\n  modificationDate: new Date('2020/04/19'),\n})\n\n// Add the PDF attachment\nawait pdfDoc.attach(pdfAttachmentBytes, 'us_constitution.pdf', {\n  mimeType: 'application/pdf',\n  description: 'Constitution of the United States 🇺🇸🦅',\n  creationDate: new Date('1787/09/17'),\n  modificationDate: new Date('1992/05/07'),\n})\n\n// Add a page with some text\nconst page = pdfDoc.addPage();\npage.drawText('This PDF has two attachments', { x: 135, y: 415 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Set Document Metadata\n\n_This example produces [this PDF](assets/pdfs/examples/set_document_metadata.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/vcwmfnbe/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available metadata fields on the PDFDocument. Note that these fields\n// are visible in the \"Document Properties\" section of most PDF readers.\npdfDoc.setTitle('🥚 The Life of an Egg 🍳')\npdfDoc.setAuthor('Humpty Dumpty')\npdfDoc.setSubject('📘 An Epic Tale of Woe 📖')\npdfDoc.setKeywords(['eggs', 'wall', 'fall', 'king', 'horses', 'men'])\npdfDoc.setProducer('PDF App 9000 🤖')\npdfDoc.setCreator('pdf-lib (https://github.com/Hopding/pdf-lib)')\npdfDoc.setCreationDate(new Date('2018-06-24T01:58:37.228Z'))\npdfDoc.setModificationDate(new Date('2019-12-21T07:00:11.000Z'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Read Document Metadata\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/eg8rfz3k/16/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument without updating its existing metadata\nconst pdfDoc = await PDFDocument.load(existingPdfBytes, { \n  updateMetadata: false \n})\n\n// Print all available metadata fields\nconsole.log('Title:', pdfDoc.getTitle())\nconsole.log('Author:', pdfDoc.getAuthor())\nconsole.log('Subject:', pdfDoc.getSubject())\nconsole.log('Creator:', pdfDoc.getCreator())\nconsole.log('Keywords:', pdfDoc.getKeywords())\nconsole.log('Producer:', pdfDoc.getProducer())\nconsole.log('Creation Date:', pdfDoc.getCreationDate())\nconsole.log('Modification Date:', pdfDoc.getModificationDate())\n```\n\nThis script outputs the following (_when [this PDF](assets/pdfs/with_cropbox.pdf) is used for the `existingPdfBytes` variable_):\n\n```\nTitle: Microsoft Word - Basic Curriculum Vitae example.doc\nAuthor: Administrator\nSubject: undefined\nCreator: PScript5.dll Version 5.2\nKeywords: undefined\nProducer: Acrobat Distiller 8.1.0 (Windows)\nCreation Date: 2010-07-29T14:26:00.000Z\nModification Date: 2010-07-29T14:26:00.000Z\n```\n\n### Draw SVG Paths\n\n_This example produces [this PDF](assets/pdfs/examples/draw_svg_paths.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bwaomr9h/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\n\n// SVG path for a wavy line\nconst svgPath =\n  'M 0,20 L 100,160 Q 130,200 150,120 C 190,-40 200,200 300,150 L 400,90'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\npage.moveTo(100, page.getHeight() - 5)\n\n// Draw the SVG path as a black line\npage.moveDown(25)\npage.drawSvgPath(svgPath)\n\n// Draw the SVG path as a thick green line\npage.moveDown(200)\npage.drawSvgPath(svgPath, { borderColor: rgb(0, 1, 0), borderWidth: 5 })\n\n// Draw the SVG path and fill it with red\npage.moveDown(200)\npage.drawSvgPath(svgPath, { color: rgb(1, 0, 0) })\n\n// Draw the SVG path at 50% of its original size\npage.moveDown(200)\npage.drawSvgPath(svgPath, { scale: 0.5 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Deno Usage\n\n`pdf-lib` fully supports the exciting new [Deno](https://deno.land/) runtime! All of the [usage examples](#usage-examples) work in Deno. The only thing you need to do is change the imports for `pdf-lib` and `@pdf-lib/fontkit` to use the [Pika](https://www.pika.dev/) CDN, because Deno requires all modules to be referenced via URLs.\n\n> **See also [How to Create and Modify PDF Files in Deno With pdf-lib](https://medium.com/swlh/how-to-create-and-modify-pdf-files-in-deno-ffaad7099b0?source=friends_link&sk=3da183bb776d059df428eaea52102f19)**\n\n### Creating a Document with Deno\n\nBelow is the [**create document**](#create-document) example modified for Deno:\n\n```js\nimport {\n  PDFDocument,\n  StandardFonts,\n  rgb,\n} from 'https://cdn.pika.dev/pdf-lib@^1.6.0';\n\nconst pdfDoc = await PDFDocument.create();\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman);\n\nconst page = pdfDoc.addPage();\nconst { width, height } = page.getSize();\nconst fontSize = 30;\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `create-document.ts`, you can execute it using Deno with the following command:\n\n```\ndeno run --allow-write create-document.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/create_document.pdf).\n\n### Embedding a Font with Deno\n\nHere's a slightly more complicated example demonstrating how to embed a font and measure text in Deno:\n\n```js\nimport {\n  degrees,\n  PDFDocument,\n  rgb,\n  StandardFonts,\n} from 'https://cdn.pika.dev/pdf-lib@^1.6.0';\nimport fontkit from 'https://cdn.pika.dev/@pdf-lib/fontkit@^1.0.0';\n\nconst url = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf';\nconst fontBytes = await fetch(url).then((res) => res.arrayBuffer());\n\nconst pdfDoc = await PDFDocument.create();\n\npdfDoc.registerFontkit(fontkit);\nconst customFont = await pdfDoc.embedFont(fontBytes);\n\nconst page = pdfDoc.addPage();\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 35;\nconst textWidth = customFont.widthOfTextAtSize(text, textSize);\nconst textHeight = customFont.heightAtSize(textSize);\n\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n});\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `custom-font.ts`, you can execute it with the following command:\n\n```\ndeno run --allow-write --allow-net custom-font.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf).\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently four apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n- [**`rn`**](apps/rn) - contains [tests](apps/rn/src/tests/) for `pdf-lib` in React Native environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a React Native environment.\n- [**`deno`**](apps/deno) - contains [tests](apps/deno/tests/) for `pdf-lib` in Deno environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/) or [jsDelivr](https://www.jsdelivr.com/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/pdf-lib@1.4.0/dist/pdf-lib.min.js\n> - https://cdn.jsdelivr.net/npm/pdf-lib@1.4.0/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\nconst pdfDoc = await PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n> - https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n## Documentation\n\nAPI documentation is available on the project site at https://pdf-lib.js.org/docs/api/.\n\nThe repo for the project site (and generated documentation files) is\nlocated here: https://github.com/Hopding/pdf-lib-docs.\n\n## Help and Discussion\n\n[Our Discord server](https://discord.gg/Y7uuVMc) is a great place to chat with us, ask questions, and learn more about pdf-lib. Come join us!\n\n## Encryption Handling\n\n`pdf-lib` does not currently support modification of encrypted documents. In general, it is not advised to use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n<h2 id=\"migrating-to-v1\">Migrating to v1.0.0</h2>\n\nThe latest release of `pdf-lib` (`v1.0.0`) includes several breaking API changes. If you have code written for older versions of `pdf-lib` (`v0.x.x`), you can use the following instructions to help migrate your code to v1.0.0.\n\nNote that many of the API methods are now asynchronous and return promises, so you'll need to `await` on them (or use promise chaining: `.then(res => ...)`).\n\n- Rename _`PDFDocumentFactory`_ to **`PDFDocument`**. `PDFDocument.create` and `PDFDocument.load` are now async (they return promises), so you'll need to `await` on them.\n\n* To create a new PDF document:\n\n  ```js\n  const pdfDoc = await PDFDocument.create();\n  ```\n\n* To retrieve and load a PDF where `pdfUrl` points to the PDF to be loaded:\n  ```js\n  const pdfBuffer = await fetch(pdfUrl).then((res) => res.arrayBuffer());\n  const pdfDoc = await PDFDocument.load(pdfBuffer);\n  ```\n\n- The purpose of making these methods asynchronous is to avoid blocking the event loop (especially for browser-based usage). If you aren't running this code client-side and are not concerned about blocking the event loop, you can speed up parsing times with:\n\n  ```js\n  PDFDocument.load(..., { parseSpeed: ParseSpeeds.Fastest })\n  ```\n\n  You can do a similar thing for save:\n\n  ```js\n  PDFDocument.save({ objectsPerTick: Infinity });\n  ```\n\n- To draw content on a page in old versions of `pdf-lib`, you needed to create a content stream, invoke some operators, register the content stream, and add it to the document. Something like the following:\n\n  ```js\n  const contentStream = pdfDoc.createContentStream(\n    drawText(\n      timesRomanFont.encodeText('Creating PDFs in JavaScript is awesome!'),\n      {\n        x: 50,\n        y: 450,\n        size: 15,\n        font: 'TimesRoman',\n        colorRgb: [0, 0.53, 0.71],\n      },\n    ),\n  );\n  page.addContentStreams(pdfDoc.register(contentStream));\n  ```\n\n  However, in new versions of `pdf-lib`, this is much simpler. You simply invoke drawing methods on the page, such as [`PDFPage.drawText`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawtext), [`PDFPage.drawImage`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawimage), [`PDFPage.drawRectangle`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawrectangle), or [`PDFPage.drawSvgPath`](https://pdf-lib.js.org/docs/api/classes/pdfpage#drawsvgpath). So the above example becomes:\n\n  ```js\n  page.drawText('Creating PDFs in JavaScript is awesome!', {\n    x: 50,\n    y: 450,\n    size: 15,\n    font: timesRomanFont,\n    color: rgb(0, 0.53, 0.71),\n  });\n  ```\n\n  Please see the [Usage Examples](#usage-examples) for more in depth examples of drawing content on a page in the new versions of `pdf-lib`. You may also find the [Complete Examples](#complete-examples) to be a useful reference.\n\n- Change _`getMaybe`_ function calls to **`get`** calls. If a property doesn't exist, then `undefined` will be returned. Note, however, that PDF name strings with need to be wrapped in `PDFName.of(...)`. For example, to look up the AcroForm object you'll need to change _`pdfDoc.catalog.getMaybe('AcroForm')`_ to **`pdfDoc.catalog.get(PDFName.of('AcroForm'))`**.\n\n  ```js\n  const acroForm = await pdfDoc.context.lookup(\n    pdfDoc.catalog.get(PDFName.of('AcroForm')),\n  );\n  ```\n\n  > v0.x.x converted the strings passed to `get` and `getMaybe` to `PDFName` objects, but v1.0.0 does not do this conversion for you. So you must always pass actual `PDFName` objects instead of strings.\n\n- To find the AcroForm field references now becomes:\n  ```js\n  const acroFieldRefs = await pdfDoc.context.lookup(\n    acroForm.get(PDFName.of('Fields')),\n  );\n  ```\n- To add a new page replace _`pdfDoc.createPage([width, height])`_ with **`pdfDoc.addPage([width, height])`**\n  ```js\n  const page = pdfDoc.addPage([500, 750]);\n  ```\n  or simply:\n  ```js\n  const page = pdfDoc.addPage();\n  ```\n\n* To get the size of the page:\n\n  ```js\n  const { width, height } = page.getSize();\n  page.getWidth();\n  page.getHeight();\n  ```\n\n* To add images replace _`pdfDoc.embedPNG`_ with **`pdfDoc.embedPng`** and _`pdfDoc.embedJPG`_ with **`pdfDoc.embedJpg`**\n\n* The `pdfDoc.embedPng` and `pdfDoc.embedJpg` methods now return `PDFImage` objects which have the width and height of the image as properties. You can also scale down the width and height by a constant factor using the `PDFImage.scale` method:\n  ```js\n  const aBigImage = await pdfDoc.embedPng(aBigImageBytes);\n  const { width, height } = aBigImage.scale(0.25);\n  ```\n  So, `const [image, dims] = pdfDoc.embedJPG(mediaBuffer)` becomes:\n  ```js\n  const image = await pdfDoc.embedJpg(mediaBuffer);\n  // image.width, image.height can be used instead of the dims object.\n  ```\n* To save the PDF replace _`PDFDocumentWriter.saveToBytes(pdfDoc)`_ with **`pdfDoc.save()`**\n\n  ```js\n  const pdfDocBytes = await pdfDoc.save();\n  ```\n\n* To display the saved PDF now becomes:\n\n  ```js\n  const pdfUrl = URL.createObjectURL(\n    new Blob([await pdfDoc.save()], { type: 'application/pdf' }),\n  );\n  window.open(pdfUrl, '_blank');\n  ```\n\n  (note: `URL.revokeObjectURL` should be called later to free up memory)\n\n* To get the PDF page count:\n\n  ```js\n  pdfDoc.getPages().length;\n  ```\n\n* To copy pages from one document to another you must now call **`destPdf.copyPages(srcPdf, srcPageIndexesArray)`** to copy pages. You can see an example of this in the [Copy Pages](#copy-pages) usage example. Admittedly, this API is slightly less ergonomic than what exists in v0.x.x, but it has two key benefits:\n\n  1. It avoids making PDFDocument.addPage and PDFDocument.insertPage async.\n     When copying multiple pages from the source document, the resulting merged document should have a smaller file size. This is because the page copying API that exists in v0.x.x was intended for copying just one or two pages.\n\n  2. When copying large numbers of pages, it could result in redundant objects being created. This new page copying API should eliminate that.\n\n  ```js\n  async function mergePdfs(pdfsToMerge: string[]) {\n    const mergedPdf = await PDFDocument.create();\n    for (const pdfCopyDoc of pdfsToMerge) {\n      const pdfBytes = fs.readFileSync(pdfCopyDoc);\n      const pdf = await PDFDocument.load(pdfBytes);\n      const copiedPages = await mergedPdf.copyPages(pdf, pdf.getPageIndices());\n      copiedPages.forEach((page) => {\n        mergedPdf.addPage(page);\n      });\n    }\n    const mergedPdfFile = await mergedPdf.save();\n    return mergedPdfFile;\n  }\n  ```\n\n* If required, you can retrieve the CropBox or MediaBox of a page like so:\n  ```js\n  const cropBox = page.node.CropBox() || page.node.MediaBox();\n  ```\n\n## Contributing\n\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine. (We try to make this as simple and fast as possible! :rocket:)\n\n## Tutorials and Cool Stuff\n\n- [Möbius Printing helper](https://shreevatsa.net/mobius-print/) - a tool created by @shreevatsa\n- [Extract PDF pages](https://shreevatsa.net/pdf-pages/) - a tool created by @shreevatsa\n- [Travel certificate generator](https://github.com/LAB-MI/deplacement-covid-19) - a tool that creates travel certificates for French citizens under quarantine due to COVID-19\n- [How to use pdf-lib in AWS Lambdas](https://medium.com/swlh/create-pdf-using-pdf-lib-on-serverless-aws-lambda-e9506246dc88) - a tutorial written by Crespo Wang\n- [Working With PDFs in Node.js Using pdf-lib](http://thecodebarbarian.com/working-with-pdfs-in-node-js.html) - a tutorial by Valeri Karpov\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.11.0-rc1","dist":{"shasum":"79db603a368c05f6b34de7d7ba1364e802fa71d4","integrity":"sha512-qc1juAMn6dQaO1j1YJP3veIUEYCGrCbPfHLZSNmtR1Wj2aBe1csHX9F7ycfDR185GLwkqOHI6lHfRXQrO+w2iQ==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.11.0-rc1.tgz","fileCount":1557,"unpackedSize":17183531,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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release:tag","release:next":"yarn publish --tag next","release:prep":"yarn clean && yarn lint && yarn typecheck && yarn test && yarn build","release:tag":"TAG=\"v$(yarn --silent get:version)\" && git tag $TAG && git push origin $TAG","get:version":"node --eval 'console.log(require(`./package.json`).version)'","clean":"rimraf ts3.4 build cjs dist es scratchpad/build coverage tsBuildInfo.json apps/node-build apps/node/tsBuildInfo.json isolate*.log flamegraph.html out.pdf","typecheck":"tsc --noEmit --incremental false --tsBuildInfoFile null","test":"jest --config jest.json --runInBand","testw":"jest --config jest.json --watch","testc":"jest --config jest.json --coverage && open coverage/index.html","lint":"yarn lint:prettier && yarn lint:tslint:src && yarn lint:tslint:tests","lint:tslint:src":"tslint --project tsconfig.json --fix","lint:tslint:tests":"tslint --project tests/tsconfig.json --fix","lint:prettier":"prettier --write \"./{src,tests,apps}/**/*.{ts,js,json,html,css}\" --loglevel error","build":"yarn build:cjs && yarn build:es && yarn build:esm && yarn build:esm:min && yarn build:umd && yarn build:umd:min && yarn build:downlevel-dts","build:cjs":"ttsc --module commonjs --outDir cjs","build:es":"ttsc --module ES2015 --outDir es","build:esm":"rollup --config rollup.config.js --file dist/pdf-lib.esm.js --environment MODULE_TYPE:es","build:esm:min":"rollup --config rollup.config.js --file dist/pdf-lib.esm.min.js --environment MINIFY,MODULE_TYPE:es","build:umd":"rollup --config rollup.config.js --file dist/pdf-lib.js --environment MODULE_TYPE:umd","build:umd:min":"rollup --config rollup.config.js --file dist/pdf-lib.min.js --environment MINIFY,MODULE_TYPE:umd","build:downlevel-dts":"rimraf ts3.4 && yarn downlevel-dts . ts3.4 && rimraf ts3.4/scratchpad","scratchpad:start":"ttsc --build scratchpad/tsconfig.json --watch","scratchpad:run":"node scratchpad/build/scratchpad/index.js","scratchpad:flame":"rimraf isolate*.log && node --prof scratchpad/build/scratchpad/index.js && node --prof-process --preprocess -j isolate*.log | flamebearer","apps:node":"ttsc --build apps/node/tsconfig.json && node apps/node-build/index.js","apps:deno":"deno run --allow-read --allow-write --allow-run apps/deno/index.ts","apps:web":"http-server -c-1 .","apps:web:mac":"bash -c 'sleep 1 && open http://localhost:8080/apps/web/test1.html' & yarn apps:web","apps:rn:ios":"cd apps/rn && yarn add ./../.. --force && react-native run-ios","apps:rn:android":"yarn apps:rn:emulator & cd apps/rn && yarn add ./../.. --force && react-native run-android","apps:rn:emulator":"emulator -avd \"$(emulator -list-avds | head -n 1)\" & bash -c 'sleep 5 && adb reverse tcp:8080 tcp:8080 && adb reverse tcp:8081 tcp:8081'"},"main":"cjs/index.js","module":"es/index.js","unpkg":"dist/pdf-lib.min.js","types":"cjs/index.d.ts","typesVersions":{"<=3.5":{"*":["ts3.4/*"]}},"dependencies":{"@pdf-lib/standard-fonts":"^1.0.0","@pdf-lib/upng":"^1.0.1","pako":"^1.0.11","tslib":"^1.11.1"},"devDependencies":{"@pdf-lib/fontkit":"^1.0.0","@rollup/plugin-commonjs":"^13.0.0","@rollup/plugin-json":"^4.1.0","@rollup/plugin-node-resolve":"^8.0.1","@types/jest":"^26.0.0","@types/node-fetch":"^2.5.7","@types/pako":"^1.0.1","@zerollup/ts-transform-paths":"^1.7.18","downlevel-dts":"^0.5.0","flamebearer":"^1.1.3","http-server":"^0.12.3","jest":"^26.0.1","node-fetch":"^2.6.0","prettier":"^2.0.5","rimraf":"^3.0.2","rollup":"^2.17.1","rollup-plugin-terser":"^6.1.0","ts-jest":"^26.1.0","tslint":"^6.1.2","tslint-config-prettier":"^1.18.0","ttypescript":"^1.5.10","typescript":"^3.9.5"},"license":"MIT","private":false,"homepage":"https://pdf-lib.js.org/","repository":{"type":"git","url":"git+https://github.com/Hopding/pdf-lib.git"},"bugs":{"url":"https://github.com/Hopding/pdf-lib/issues"},"keywords":["pdf-lib","pdf","document","create","modify","creation","modification","edit","editing","typescript","javascript","library"],"readmeFilename":"README.md","readme":"<a href=\"https://pdf-lib.js.org\">\n<h1 align=\"center\">\n<img alt=\"pdf-lib\" height=\"300\" src=\"https://raw.githubusercontent.com/Hopding/pdf-lib-docs/master/assets/logo-full.svg?sanitize=true\">\n</h1>\n</a>\n\n<div align=\"center\">\n  <strong>Create and modify PDF documents in any JavaScript environment.</strong>\n</div>\n<div align=\"center\">\n  Designed to work in any modern JavaScript runtime. Tested in Node, Browser, Deno, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n  <!-- Discord Badge -->\n  <a href=\"https://discord.gg/Y7uuVMc\">\n    <img\n      src=\"https://img.shields.io/static/v1?label=discord&message=pdf-lib&color=566fbb&style=flat-square\"\n      alt=\"Discord Badge\"\n    />\n  </a>\n</div>\n\n<br />\n\n> **Learn more at [pdf-lib.js.org](https://pdf-lib.js.org)**\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Create Form](#create-form) - _**new!**_\n  - [Fill Form](#fill-form) - _**new!**_\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed PDF Pages](#embed-pdf-pages)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n  - [Add Attachments](#add-attachments)\n  - [Set Document Metadata](#set-document-metadata)\n  - [Read Document Metadata](#read-document-metadata)\n  - [Draw SVG Paths](#draw-svg-paths)\n- [Deno Usage](#deno-usage)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Documentation](#documentation)\n- [Fonts and Unicode](#fonts-and-unicode)\n- [Creating and Filling Forms](#creating-and-filling-forms)\n- [Limitations](#limitations)\n- [Help and Discussion](#help-and-discussion)\n- [Encryption Handling](#encryption-handling)\n- [Migrating to v1.0.0](/MIGRATION.md)\n- [Contributing](#contributing)\n- [Tutorials and Cool Stuff](#tutorials-and-cool-stuff)\n- [Prior Art](#prior-art)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Create forms - _**new!**_\n- Fill forms - _**new!**_\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw PDF Pages\n- Draw Vector Graphics\n- Draw SVG Paths\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n- Set document metadata\n- Read document metadata\n- Add attachments\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rxwsc8f5/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/64zajhge/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Create Form\n\n_This example produces [this PDF](assets/pdfs/examples/create_form.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bct7vngL/4/)\n\n> See also [Creating and Filling Forms](#creating-and-filling-forms)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage([550, 750])\n\n// Get the form so we can add fields to it\nconst form = pdfDoc.getForm()\n\n// Add the superhero text field and description\npage.drawText('Enter your favorite superhero:', { x: 50, y: 700, size: 20 })\n\nconst superheroField = form.createTextField('favorite.superhero')\nsuperheroField.setText('One Punch Man')\nsuperheroField.addToPage(page, { x: 55, y: 640 })\n\n// Add the rocket radio group, labels, and description\npage.drawText('Select your favorite rocket:', { x: 50, y: 600, size: 20 })\n\npage.drawText('Falcon Heavy', { x: 120, y: 560, size: 18 })\npage.drawText('Saturn IV', { x: 120, y: 500, size: 18 })\npage.drawText('Delta IV Heavy', { x: 340, y: 560, size: 18 })\npage.drawText('Space Launch System', { x: 340, y: 500, size: 18 })\n\nconst rocketField = form.createRadioGroup('favorite.rocket')\nrocketField.addOptionToPage('Falcon Heavy', page, { x: 55, y: 540 })\nrocketField.addOptionToPage('Saturn IV', page, { x: 55, y: 480 })\nrocketField.addOptionToPage('Delta IV Heavy', page, { x: 275, y: 540 })\nrocketField.addOptionToPage('Space Launch System', page, { x: 275, y: 480 })\nrocketField.select('Saturn IV')\n\n// Add the gundam check boxes, labels, and description\npage.drawText('Select your favorite gundams:', { x: 50, y: 440, size: 20 })\n\npage.drawText('Exia', { x: 120, y: 400, size: 18 })\npage.drawText('Kyrios', { x: 120, y: 340, size: 18 })\npage.drawText('Virtue', { x: 340, y: 400, size: 18 })\npage.drawText('Dynames', { x: 340, y: 340, size: 18 })\n\nconst exiaField = form.createCheckBox('gundam.exia')\nconst kyriosField = form.createCheckBox('gundam.kyrios')\nconst virtueField = form.createCheckBox('gundam.virtue')\nconst dynamesField = form.createCheckBox('gundam.dynames')\n\nexiaField.addToPage(page, { x: 55, y: 380 })\nkyriosField.addToPage(page, { x: 55, y: 320 })\nvirtueField.addToPage(page, { x: 275, y: 380 })\ndynamesField.addToPage(page, { x: 275, y: 320 })\n\nexiaField.check()\ndynamesField.check()\n\n// Add the planet dropdown and description\npage.drawText('Select your favorite planet*:', { x: 50, y: 280, size: 20 })\n\nconst planetsField = form.createDropdown('favorite.planet')\nplanetsField.addOptions(['Venus', 'Earth', 'Mars', 'Pluto'])\nplanetsField.select('Pluto')\nplanetsField.addToPage(page, { x: 55, y: 220 })\n\n// Add the person option list and description\npage.drawText('Select your favorite person:', { x: 50, y: 180, size: 18 })\n\nconst personField = form.createOptionList('favorite.person')\npersonField.addOptions([\n  'Julius Caesar',\n  'Ada Lovelace',\n  'Cleopatra',\n  'Aaron Burr',\n  'Mark Antony',\n])\npersonField.select('Ada Lovelace')\npersonField.addToPage(page, { x: 55, y: 70 })\n\n// Just saying...\npage.drawText(`* Pluto should be a planet too!`, { x: 15, y: 15, size: 15 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Fill Form\n\n_This example produces [this PDF](assets/pdfs/examples/fill_form.pdf)_ (when [this PDF](assets/pdfs/dod_character.pdf) is used for the `formPdfBytes` variable, [this image](assets/images/small_mario.png) is used for the `marioImageBytes` variable, and [this image](assets/images/mario_emblem.png) is used for the `emblemImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/0mwfqkv6/3/)\n\n> See also [Creating and Filling Forms](#creating-and-filling-forms)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst formPdfBytes = ...\nconst marioImageBytes = ...\nconst emblemImageBytes = ...\n\n// Load a PDF with form fields\nconst pdfDoc = await PDFDocument.load(formPdfBytes)\n\n// Embed the Mario and emblem images\nconst marioImage = await pdfDoc.embedPng(marioImageBytes)\nconst emblemImage = await pdfDoc.embedPng(emblemImageBytes)\n\n// Get the form containing all the fields\nconst form = pdfDoc.getForm()\n\n// Get all fields in the PDF by their names\nconst nameField = form.getTextField('CharacterName 2')\nconst ageField = form.getTextField('Age')\nconst heightField = form.getTextField('Height')\nconst weightField = form.getTextField('Weight')\nconst eyesField = form.getTextField('Eyes')\nconst skinField = form.getTextField('Skin')\nconst hairField = form.getTextField('Hair')\n\nconst alliesField = form.getTextField('Allies')\nconst factionField = form.getTextField('FactionName')\nconst backstoryField = form.getTextField('Backstory')\nconst traitsField = form.getTextField('Feat+Traits')\nconst treasureField = form.getTextField('Treasure')\n\nconst characterImageField = form.getButton('CHARACTER IMAGE')\nconst factionImageField = form.getButton('Faction Symbol Image')\n\n// Fill in the basic info fields\nnameField.setText('Mario')\nageField.setText('24 years')\nheightField.setText(`5' 1\"`)\nweightField.setText('196 lbs')\neyesField.setText('blue')\nskinField.setText('white')\nhairField.setText('brown')\n\n// Fill the character image field with our Mario image\ncharacterImageField.setImage(marioImage)\n\n// Fill in the allies field\nalliesField.setText(\n  [\n    `Allies:`,\n    `  • Princess Daisy`,\n    `  • Princess Peach`,\n    `  • Rosalina`,\n    `  • Geno`,\n    `  • Luigi`,\n    `  • Donkey Kong`,\n    `  • Yoshi`,\n    `  • Diddy Kong`,\n    ``,\n    `Organizations:`,\n    `  • Italian Plumbers Association`,\n  ].join('\\n'),\n)\n\n// Fill in the faction name field\nfactionField.setText(`Mario's Emblem`)\n\n// Fill the faction image field with our emblem image\nfactionImageField.setImage(emblemImage)\n\n// Fill in the backstory field\nbackstoryField.setText(\n  `Mario is a fictional character in the Mario video game franchise, owned by Nintendo and created by Japanese video game designer Shigeru Miyamoto. Serving as the company's mascot and the eponymous protagonist of the series, Mario has appeared in over 200 video games since his creation. Depicted as a short, pudgy, Italian plumber who resides in the Mushroom Kingdom, his adventures generally center upon rescuing Princess Peach from the Koopa villain Bowser. His younger brother and sidekick is Luigi.`,\n)\n\n// Fill in the traits field\ntraitsField.setText(\n  [\n    `Mario can use three basic three power-ups:`,\n    `  • the Super Mushroom, which causes Mario to grow larger`,\n    `  • the Fire Flower, which allows Mario to throw fireballs`,\n    `  • the Starman, which gives Mario temporary invincibility`,\n  ].join('\\n'),\n)\n\n// Fill in the treasure field\ntreasureField.setText(['• Gold coins', '• Treasure chests'].join('\\n'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/ybank8s9/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and \n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the \n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PDF Pages\n\n_This example produces [this PDF](assets/pdfs/examples/embed_pdf_pages.pdf)_ (when [this PDF](assets/pdfs/american_flag.pdf) is used for the `americanFlagPdfBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `usConstitutionPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/Lyb16ocj/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst americanFlagPdfBytes = ...\nconst usConstitutionPdfBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the American flag PDF bytes\nconst [americanFlag] = await pdfDoc.embedPdf(americanFlagPdfBytes)\n\n// Load the U.S. constitution PDF bytes\nconst usConstitutionPdf = await PDFDocument.load(usConstitutionPdfBytes)\n\n// Embed the second page of the constitution and clip the preamble\nconst preamble = await pdfDoc.embedPage(usConstitutionPdf.getPages()[1], {\n  left: 55,\n  bottom: 485,\n  right: 300,\n  top: 575,\n})\n\n// Get the width/height of the American flag PDF scaled down to 30% of \n// its original size\nconst americanFlagDims = americanFlag.scale(0.3)\n\n// Get the width/height of the preamble clipping scaled up to 225% of \n// its original size\nconst preambleDims = preamble.scale(2.25)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the American flag image in the center top of the page\npage.drawPage(americanFlag, {\n  ...americanFlagDims,\n  x: page.getWidth() / 2 - americanFlagDims.width / 2,\n  y: page.getHeight() - americanFlagDims.height - 150,\n})\n\n// Draw the preamble clipping in the center bottom of the page\npage.drawPage(preamble, {\n  ...preambleDims,\n  x: page.getWidth() / 2 - preambleDims.width / 2,\n  y: page.getHeight() / 2 - preambleDims.height / 2 - 50,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rgu6ca59/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If you're running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Add Attachments\n\n_This example produces [this PDF](assets/pdfs/examples/add_attachments.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgAttachmentBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `pdfAttachmentBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/9snL63wj/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgAttachmentBytes = ...\nconst pdfAttachmentBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add the JPG attachment\nawait pdfDoc.attach(jpgAttachmentBytes, 'cat_riding_unicorn.jpg', {\n  mimeType: 'image/jpeg',\n  description: 'Cool cat riding a unicorn! 🦄🐈🕶️',\n  creationDate: new Date('2019/12/01'),\n  modificationDate: new Date('2020/04/19'),\n})\n\n// Add the PDF attachment\nawait pdfDoc.attach(pdfAttachmentBytes, 'us_constitution.pdf', {\n  mimeType: 'application/pdf',\n  description: 'Constitution of the United States 🇺🇸🦅',\n  creationDate: new Date('1787/09/17'),\n  modificationDate: new Date('1992/05/07'),\n})\n\n// Add a page with some text\nconst page = pdfDoc.addPage();\npage.drawText('This PDF has two attachments', { x: 135, y: 415 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Set Document Metadata\n\n_This example produces [this PDF](assets/pdfs/examples/set_document_metadata.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/vcwmfnbe/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available metadata fields on the PDFDocument. Note that these fields\n// are visible in the \"Document Properties\" section of most PDF readers.\npdfDoc.setTitle('🥚 The Life of an Egg 🍳')\npdfDoc.setAuthor('Humpty Dumpty')\npdfDoc.setSubject('📘 An Epic Tale of Woe 📖')\npdfDoc.setKeywords(['eggs', 'wall', 'fall', 'king', 'horses', 'men'])\npdfDoc.setProducer('PDF App 9000 🤖')\npdfDoc.setCreator('pdf-lib (https://github.com/Hopding/pdf-lib)')\npdfDoc.setCreationDate(new Date('2018-06-24T01:58:37.228Z'))\npdfDoc.setModificationDate(new Date('2019-12-21T07:00:11.000Z'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Read Document Metadata\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/eg8rfz3k/16/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument without updating its existing metadata\nconst pdfDoc = await PDFDocument.load(existingPdfBytes, { \n  updateMetadata: false \n})\n\n// Print all available metadata fields\nconsole.log('Title:', pdfDoc.getTitle())\nconsole.log('Author:', pdfDoc.getAuthor())\nconsole.log('Subject:', pdfDoc.getSubject())\nconsole.log('Creator:', pdfDoc.getCreator())\nconsole.log('Keywords:', pdfDoc.getKeywords())\nconsole.log('Producer:', pdfDoc.getProducer())\nconsole.log('Creation Date:', pdfDoc.getCreationDate())\nconsole.log('Modification Date:', pdfDoc.getModificationDate())\n```\n\nThis script outputs the following (_when [this PDF](assets/pdfs/with_cropbox.pdf) is used for the `existingPdfBytes` variable_):\n\n```\nTitle: Microsoft Word - Basic Curriculum Vitae example.doc\nAuthor: Administrator\nSubject: undefined\nCreator: PScript5.dll Version 5.2\nKeywords: undefined\nProducer: Acrobat Distiller 8.1.0 (Windows)\nCreation Date: 2010-07-29T14:26:00.000Z\nModification Date: 2010-07-29T14:26:00.000Z\n```\n\n### Draw SVG Paths\n\n_This example produces [this PDF](assets/pdfs/examples/draw_svg_paths.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bwaomr9h/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\n\n// SVG path for a wavy line\nconst svgPath =\n  'M 0,20 L 100,160 Q 130,200 150,120 C 190,-40 200,200 300,150 L 400,90'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\npage.moveTo(100, page.getHeight() - 5)\n\n// Draw the SVG path as a black line\npage.moveDown(25)\npage.drawSvgPath(svgPath)\n\n// Draw the SVG path as a thick green line\npage.moveDown(200)\npage.drawSvgPath(svgPath, { borderColor: rgb(0, 1, 0), borderWidth: 5 })\n\n// Draw the SVG path and fill it with red\npage.moveDown(200)\npage.drawSvgPath(svgPath, { color: rgb(1, 0, 0) })\n\n// Draw the SVG path at 50% of its original size\npage.moveDown(200)\npage.drawSvgPath(svgPath, { scale: 0.5 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Deno Usage\n\n`pdf-lib` fully supports the exciting new [Deno](https://deno.land/) runtime! All of the [usage examples](#usage-examples) work in Deno. The only thing you need to do is change the imports for `pdf-lib` and `@pdf-lib/fontkit` to use the [Pika](https://www.pika.dev/) CDN, because Deno requires all modules to be referenced via URLs.\n\n> **See also [How to Create and Modify PDF Files in Deno With pdf-lib](https://medium.com/swlh/how-to-create-and-modify-pdf-files-in-deno-ffaad7099b0?source=friends_link&sk=3da183bb776d059df428eaea52102f19)**\n\n### Creating a Document with Deno\n\nBelow is the [**create document**](#create-document) example modified for Deno:\n\n```js\nimport {\n  PDFDocument,\n  StandardFonts,\n  rgb,\n} from 'https://cdn.pika.dev/pdf-lib@^1.6.0';\n\nconst pdfDoc = await PDFDocument.create();\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman);\n\nconst page = pdfDoc.addPage();\nconst { width, height } = page.getSize();\nconst fontSize = 30;\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `create-document.ts`, you can execute it using Deno with the following command:\n\n```\ndeno run --allow-write create-document.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/create_document.pdf).\n\n### Embedding a Font with Deno\n\nHere's a slightly more complicated example demonstrating how to embed a font and measure text in Deno:\n\n```js\nimport {\n  degrees,\n  PDFDocument,\n  rgb,\n  StandardFonts,\n} from 'https://cdn.pika.dev/pdf-lib@^1.6.0';\nimport fontkit from 'https://cdn.pika.dev/@pdf-lib/fontkit@^1.0.0';\n\nconst url = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf';\nconst fontBytes = await fetch(url).then((res) => res.arrayBuffer());\n\nconst pdfDoc = await PDFDocument.create();\n\npdfDoc.registerFontkit(fontkit);\nconst customFont = await pdfDoc.embedFont(fontBytes);\n\nconst page = pdfDoc.addPage();\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 35;\nconst textWidth = customFont.widthOfTextAtSize(text, textSize);\nconst textHeight = customFont.heightAtSize(textSize);\n\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n});\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `custom-font.ts`, you can execute it with the following command:\n\n```\ndeno run --allow-write --allow-net custom-font.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf).\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently four apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n- [**`rn`**](apps/rn) - contains [tests](apps/rn/src/tests/) for `pdf-lib` in React Native environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a React Native environment.\n- [**`deno`**](apps/deno) - contains [tests](apps/deno/tests/) for `pdf-lib` in Deno environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/) or [jsDelivr](https://www.jsdelivr.com/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/pdf-lib@1.4.0/dist/pdf-lib.min.js\n> - https://cdn.jsdelivr.net/npm/pdf-lib@1.4.0/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\nconst pdfDoc = await PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n> - https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n## Documentation\n\nAPI documentation is available on the project site at https://pdf-lib.js.org/docs/api/.\n\nThe repo for the project site (and generated documentation files) is\nlocated here: https://github.com/Hopding/pdf-lib-docs.\n\n## Fonts and Unicode\n\nWhen working with PDFs, you will frequently come across the terms \"character encoding\" and \"font\". If you have experience in web development, you may wonder why these are so prevalent. Aren't they just annoying details that you shouldn't need to worry about? Shouldn't PDF libraries and readers be able to handle all of this for you like web browsers can? Unfortunately, this is not the case. The nature of the PDF file format makes it very difficult to avoid thinking about character encodings and fonts when working with PDFs.\n\n`pdf-lib` does its best to simplify things for you. But it can't perform magic. This means you should be aware of the following:\n\n- **There are 14 standard fonts** defined in the PDF specification. They are as follows: _Times Roman_ (normal, bold, and italic), _Helvetica_ (normal, bold, and italic), _Courier_ (normal, bold, and italic), _ZapfDingbats_ (normal), and _Symbol_ (normal). These 14 fonts are guaranteed to be available in PDF readers. As such, you do not need to embed any font data if you wish to use one of these fonts. You can use a standard font like so:\n  <!-- prettier-ignore -->\n  ```js\n  import { PDFDocument, StandardFonts } from 'pdf-lib'\n  const pdfDoc = await PDFDocument.create()\n  const courierFont = await pdfDoc.embedFont(StandardFonts.Courier)\n  const page = pdfDoc.addPage()\n  page.drawText('Some boring latin text in the Courier font', { \n    font: courierFont,\n  })\n  ```\n- **The standard fonts do not support all characters** available in Unicode. The Times Roman, Helvetica, and Courier fonts use WinAnsi encoding (aka [Windows-1252](https://en.wikipedia.org/wiki/Windows-1252)). The WinAnsi character set only supports 218 characters in the Latin alphabet. For this reason, many users will find the standard fonts insufficient for their use case. This is unfortunate, but there's nothing that PDF libraries can do to change this. This is a result of the PDF specification and its age. Note that the [ZapfDingbats](https://en.wikipedia.org/wiki/Zapf_Dingbats) and [Symbol](<https://en.wikipedia.org/wiki/Symbol_(typeface)>) fonts use their own specialized encodings that support 203 and 194 characters, respectively. However, the characters they support are not useful for most use cases. See [here](assets/pdfs/standard_fonts_demo.pdf) for an example of all 14 standard fonts.\n- **You can use characters outside the Latin alphabet** by embedding your own fonts. Embedding your own font requires to you load the font data (from a file or via a network request, for example) and pass it to the `embedFont` method. When you embed your own font, you can use any Unicode characters that it supports. This capability frees you from the limitations imposed by the standard fonts. Most PDF files use embedded fonts. You can embed and use a custom font like so ([see also](#embed-font-and-measure-text)):\n  <!-- prettier-ignore -->\n  ```js\n  import { PDFDocument } from 'pdf-lib'\n  import fontkit from '@pdf-lib/fontkit'\n\n  const url = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf'\n  const fontBytes = await fetch(url).then((res) => res.arrayBuffer())\n\n  const pdfDoc = await PDFDocument.create()\n\n  pdfDoc.registerFontkit(fontkit)\n  const ubuntuFont = await pdfDoc.embedFont(fontBytes)\n\n  const page = pdfDoc.addPage()\n  page.drawText('Some fancy Unicode text in the ŪЬȕǹƚü font', { \n    font: ubuntuFont,\n  })\n  ```\n\nNote that encoding errors will be thrown if you try to use a character with a font that does not support it. For example, `Ω` is not in the WinAnsi character set. So trying to draw it on a page with the standard Helvetica font will throw the following error:\n\n```\nError: WinAnsi cannot encode \"Ω\" (0x03a9)\n    at Encoding.encodeUnicodeCodePoint\n```\n\n## Creating and Filling Forms\n\n`pdf-lib` can create, fill, and read PDF form fields. The following field types are supported:\n\n- [Buttons](https://pdf-lib.js.org/docs/api/classes/pdfbutton)\n- [Check Boxes](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox)\n- [Dropdowns](https://pdf-lib.js.org/docs/api/classes/pdfdropdown)\n- [Option Lists](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist)\n- [Radio Groups](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup)\n- [Text Fields](https://pdf-lib.js.org/docs/api/classes/pdftextfield)\n\nSee the [form creation](#create-form) and [form filling](#fill-form) usage examples for code samples. Tests 1, 14, 15, 16, and 17 in the [complete examples](#complete-examples) contain working example code for form creation and filling in a variety of different JS environments.\n\n**IMPORTANT:** The default font used to display text in buttons, dropdowns, option lists, and text fields is the standard Helvetica font. This font only supports characters in the latin alphabet (see [Fonts and Unicode](#fonts-and-unicode) for details). This means that if any of these field types are created or modified to contain text outside the latin alphabet (as is often the case), you will need to embed and use a custom font to update the field appearances. Otherwise an error will be thrown (likely when you save the `PDFDocument`).\n\nYou can use an embedded font when filling form fields as follows:\n\n```js\nimport { PDFDocument } from 'pdf-lib';\nimport fontkit from '@pdf-lib/fontkit';\n\n// Fetch the PDF with form fields\nconst formUrl = 'https://pdf-lib.js.org/assets/dod_character.pdf';\nconst formBytes = await fetch(formUrl).then((res) => res.arrayBuffer());\n\n// Fetch the Ubuntu font\nconst fontUrl = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf';\nconst fontBytes = await fetch(fontUrl).then((res) => res.arrayBuffer());\n\n// Load the PDF with form fields\nconst pdfDoc = await PDFDocument.load(formBytes);\n\n// Embed the Ubuntu font\npdfDoc.registerFontkit(fontkit);\nconst ubuntuFont = await pdfDoc.embedFont(fontBytes);\n\n// Get two text fields from the form\nconst form = pdfDoc.getForm();\nconst nameField = form.getTextField('CharacterName 2');\nconst ageField = form.getTextField('Age');\n\n// Fill the text fields with some fancy Unicode characters (outside\n// the WinAnsi latin character set)\nnameField.setText('Ӎӑȑїõ');\nageField.setText('24 ŷȇȁŗš');\n\n// **Key Step:** Update the field appearances with the Ubuntu font\nform.updateFieldAppearances(ubuntuFont);\n\n// Save the PDF with filled form fields\nconst pdfBytes = await pdfDoc.save();\n```\n\n### Handy Methods for Filling, Creating, and Reading Form Fields\n\nExisting form fields can be accessed with the following methods of [`PDFForm`](https://pdf-lib.js.org/docs/api/classes/pdfform):\n\n- [`PDFForm.getButton`](https://pdf-lib.js.org/docs/api/classes/pdfform#getbutton)\n- [`PDFForm.getCheckBox`](https://pdf-lib.js.org/docs/api/classes/pdfform#getcheckbox)\n- [`PDFForm.getDropdown`](https://pdf-lib.js.org/docs/api/classes/pdfform#getdropdown)\n- [`PDFForm.getOptionList`](https://pdf-lib.js.org/docs/api/classes/pdfform#getoptionlist)\n- [`PDFForm.getRadioGroup`](https://pdf-lib.js.org/docs/api/classes/pdfform#getradiogroup)\n- [`PDFForm.getTextField`](https://pdf-lib.js.org/docs/api/classes/pdfform#gettextfield)\n\nNew form fields can be created with the following methods of [`PDFForm`](https://pdf-lib.js.org/docs/api/classes/pdfform):\n\n- [`PDFForm.createButton`](https://pdf-lib.js.org/docs/api/classes/pdfform#createbutton)\n- [`PDFForm.createCheckBox`](https://pdf-lib.js.org/docs/api/classes/pdfform#createcheckbox)\n- [`PDFForm.createDropdown`](https://pdf-lib.js.org/docs/api/classes/pdfform#createdropdown)\n- [`PDFForm.createOptionList`](https://pdf-lib.js.org/docs/api/classes/pdfform#createoptionlist)\n- [`PDFForm.createRadioGroup`](https://pdf-lib.js.org/docs/api/classes/pdfform#createradiogroup)\n- [`PDFForm.createTextField`](https://pdf-lib.js.org/docs/api/classes/pdfform#createtextfield)\n\nBelow are some of the most commonly used methods for reading and filling the aforementioned subclasses of [`PDFField`](https://pdf-lib.js.org/docs/api/classes/pdffield):\n\n- [`PDFCheckBox.check`](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox#check)\n- [`PDFCheckBox.uncheck`](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox#uncheck)\n- [`PDFCheckBox.isChecked`](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox#ischecked)\n\n---\n\n- [`PDFDropdown.select`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#select)\n- [`PDFDropdown.clear`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#clear)\n- [`PDFDropdown.getSelected`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#getselected)\n- [`PDFDropdown.getOptions`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#getoptions)\n- [`PDFDropdown.addOptions`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#addoptions)\n\n---\n\n- [`PDFOptionList.select`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#select)\n- [`PDFOptionList.clear`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#clear)\n- [`PDFOptionList.getSelected`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#getselected)\n- [`PDFOptionList.getOptions`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#getoptions)\n- [`PDFOptionList.addOptions`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#addoptions)\n\n---\n\n- [`PDFRadioGroup.select`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#select)\n- [`PDFRadioGroup.clear`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#clear)\n- [`PDFRadioGroup.getSelected`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#getselected)\n- [`PDFRadioGroup.getOptions`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#getoptions)\n- [`PDFRadioGroup.addOptionToPage`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#addoptiontopage)\n\n---\n\n- [`PDFTextField.setText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#settext)\n- [`PDFTextField.getText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#gettext)\n- [`PDFTextField.setMaxLength`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#setmaxlength)\n- [`PDFTextField.getMaxLength`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#getmaxlength)\n- [`PDFTextField.removeMaxLength`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#removemaxlength)\n\n## Limitations\n\n- `pdf-lib` **can** extract the content of text fields (see [`PDFTextField.getText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#gettext)), but it **cannot** extract plain text on a page outside of a form field. This is a difficult feature to implement, but it is within the scope of this library and may be added to `pdf-lib` in the future. See\n  [#93](https://github.com/Hopding/pdf-lib/issues/93),\n  [#137](https://github.com/Hopding/pdf-lib/issues/137),\n  [#177](https://github.com/Hopding/pdf-lib/issues/177),\n  [#329](https://github.com/Hopding/pdf-lib/issues/329), and\n  [#380](https://github.com/Hopding/pdf-lib/issues/380).\n- `pdf-lib` **can** remove and edit the content of text fields (see [`PDFTextField.setText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#settext)), but it does **not** provide APIs for removing or editing text on a page outside of a form field. This is also a difficult feature to implement, but is within the scope of `pdf-lib` and may be added in the future. See\n  [#93](https://github.com/Hopding/pdf-lib/issues/93),\n  [#137](https://github.com/Hopding/pdf-lib/issues/137),\n  [#177](https://github.com/Hopding/pdf-lib/issues/177),\n  [#329](https://github.com/Hopding/pdf-lib/issues/329), and\n  [#380](https://github.com/Hopding/pdf-lib/issues/380).\n- `pdf-lib` does **not** support the use of HTML or CSS when adding content to a PDF. Similarly, `pdf-lib` **cannot** embed HTML/CSS content into PDFs. As convenient as such a feature might be, it would be extremely difficult to implement and is far beyond the scope of this library. If this capability is something you need, consider using [Puppeteer](https://github.com/puppeteer/puppeteer).\n\n## Help and Discussion\n\n[Our Discord server](https://discord.gg/Y7uuVMc) is a great place to chat with us, ask questions, and learn more about pdf-lib. Come join us!\n\n## Encryption Handling\n\n**`pdf-lib` does not currently support encrypted documents.** You should not use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n**You should not use this option.** It only exists for backwards compatibility reasons.\n\n## Contributing\n\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine. (We try to make this as simple and fast as possible! :rocket:)\n\n## Tutorials and Cool Stuff\n\n- [Möbius Printing helper](https://shreevatsa.net/mobius-print/) - a tool created by @shreevatsa\n- [Extract PDF pages](https://shreevatsa.net/pdf-pages/) - a tool created by @shreevatsa\n- [Travel certificate generator](https://github.com/LAB-MI/deplacement-covid-19) - a tool that creates travel certificates for French citizens under quarantine due to COVID-19\n- [How to use pdf-lib in AWS Lambdas](https://medium.com/swlh/create-pdf-using-pdf-lib-on-serverless-aws-lambda-e9506246dc88) - a tutorial written by Crespo Wang\n- [Working With PDFs in Node.js Using pdf-lib](http://thecodebarbarian.com/working-with-pdfs-in-node-js.html) - a tutorial by Valeri Karpov\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`pdfbox`](https://pdfbox.apache.org/) is a PDF generation and modification library written in Java. This library was an invaluable reference when implementing form creation and filling APIs for `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## License\n\n[MIT](LICENSE.md)\n","licenseText":"MIT License\n\nCopyright (c) 2019 Andrew Dillon\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n","_id":"pdf-lib@1.11.2-rc1","dist":{"shasum":"5bf36a5e1e1e4ec064c284e3093aedfec6d68ea4","integrity":"sha512-Ze6doNhPHH4rXnFanRJXVjtfpSo5v7RpdxQz8YNeg6KW4OSTjMvdZVrE0NOh9om8DTSmoleI89QurolippuJBQ==","tarball":"https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.11.2-rc1.tgz","fileCount":1568,"unpackedSize":18488921,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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Tested in Node, Browser, Deno, and React Native environments.\n</div>\n\n<br />\n\n<div align=\"center\">\n  <!-- NPM Version -->\n  <a href=\"https://www.npmjs.com/package/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/npm/v/pdf-lib.svg?style=flat-square\"\n      alt=\"NPM Version\"\n    />\n  </a>\n  <!-- Build Status -->\n  <a href=\"https://circleci.com/gh/Hopding/pdf-lib\">\n    <img\n      src=\"https://img.shields.io/circleci/project/github/Hopding/pdf-lib/master.svg?style=flat-square&label=CircleCI\"\n      alt=\"CircleCI Build Status\"\n    />\n  </a>\n  <!-- Prettier Badge -->\n  <a href=\"https://prettier.io/\">\n    <img\n      src=\"https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square\"\n      alt=\"Prettier Badge\"\n    />\n  </a>\n  <!-- Discord Badge -->\n  <a href=\"https://discord.gg/Y7uuVMc\">\n    <img\n      src=\"https://img.shields.io/static/v1?label=discord&message=pdf-lib&color=566fbb&style=flat-square\"\n      alt=\"Discord Badge\"\n    />\n  </a>\n</div>\n\n<br />\n\n> **Learn more at [pdf-lib.js.org](https://pdf-lib.js.org)**\n\n## Table of Contents\n\n- [Features](#features)\n- [Motivation](#motivation)\n- [Usage Examples](#usage-examples)\n  - [Create Document](#create-document)\n  - [Modify Document](#modify-document)\n  - [Create Form](#create-form)\n  - [Fill Form](#fill-form)\n  - [Flatten Form](#flatten-form)\n  - [Copy Pages](#copy-pages)\n  - [Embed PNG and JPEG Images](#embed-png-and-jpeg-images)\n  - [Embed PDF Pages](#embed-pdf-pages)\n  - [Embed Font and Measure Text](#embed-font-and-measure-text)\n  - [Add Attachments](#add-attachments)\n  - [Set Document Metadata](#set-document-metadata)\n  - [Read Document Metadata](#read-document-metadata)\n  - [Set Viewer Preferences](#set-viewer-preferences)\n  - [Read Viewer Preferences](#read-viewer-preferences)\n  - [Draw SVG Paths](#draw-svg-paths)\n- [Deno Usage](#deno-usage)\n- [Complete Examples](#complete-examples)\n- [Installation](#installation)\n- [Documentation](#documentation)\n- [Fonts and Unicode](#fonts-and-unicode)\n- [Creating and Filling Forms](#creating-and-filling-forms)\n- [Limitations](#limitations)\n- [Help and Discussion](#help-and-discussion)\n- [Encryption Handling](#encryption-handling)\n- [Migrating to v1.0.0](docs/MIGRATION.md)\n- [Contributing](#contributing)\n- [Maintainership](#maintainership)\n- [Tutorials and Cool Stuff](#tutorials-and-cool-stuff)\n- [Prior Art](#prior-art)\n- [Git History Rewrite](#git-history-rewrite)\n- [License](#license)\n\n## Features\n\n- Create new PDFs\n- Modify existing PDFs\n- Create forms\n- Fill forms\n- Flatten forms\n- Add Pages\n- Insert Pages\n- Remove Pages\n- Copy pages between PDFs\n- Draw Text\n- Draw Images\n- Draw PDF Pages\n- Draw Vector Graphics\n- Draw SVG Paths\n- Measure width and height of text\n- Embed Fonts (supports UTF-8 and UTF-16 character sets)\n- Set document metadata\n- Read document metadata\n- Set viewer preferences\n- Read viewer preferences\n- Add attachments\n\n## Motivation\n\n`pdf-lib` was created to address the JavaScript ecosystem's lack of robust support for PDF manipulation (especially for PDF _modification_).\n\nTwo of `pdf-lib`'s distinguishing features are:\n\n1. Supporting modification (editing) of existing documents.\n2. Working in all JavaScript environments - not just in Node or the Browser.\n\nThere are [other](#prior-art) good open source JavaScript PDF libraries available. However, most of them can only _create_ documents, they cannot _modify_ existing ones. And many of them only work in particular environments.\n\n## Usage Examples\n\n### Create Document\n\n_This example produces [this PDF](assets/pdfs/examples/create_document.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rxwsc8f5/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts, rgb } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Get the width and height of the page\nconst { width, height } = page.getSize()\n\n// Draw a string of text toward the top of the page\nconst fontSize = 30\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Modify Document\n\n_This example produces [this PDF](assets/pdfs/examples/modify_document.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `existingPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/64zajhge/1/)\n\n<!-- prettier-ignore -->\n```js\nimport { degrees, PDFDocument, rgb, StandardFonts } from 'pdf-lib';\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument from the existing PDF bytes\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\n\n// Embed the Helvetica font\nconst helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica)\n\n// Get the first page of the document\nconst pages = pdfDoc.getPages()\nconst firstPage = pages[0]\n\n// Get the width and height of the first page\nconst { width, height } = firstPage.getSize()\n\n// Draw a string of text diagonally across the first page\nfirstPage.drawText('This text was added with JavaScript!', {\n  x: 5,\n  y: height / 2 + 300,\n  size: 50,\n  font: helveticaFont,\n  color: rgb(0.95, 0.1, 0.1),\n  rotate: degrees(-45),\n})\n\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Create Form\n\n_This example produces [this PDF](assets/pdfs/examples/create_form.pdf)._\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bct7vngL/4/)\n\n> See also [Creating and Filling Forms](#creating-and-filling-forms)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage([550, 750])\n\n// Get the form so we can add fields to it\nconst form = pdfDoc.getForm()\n\n// Add the superhero text field and description\npage.drawText('Enter your favorite superhero:', { x: 50, y: 700, size: 20 })\n\nconst superheroField = form.createTextField('favorite.superhero')\nsuperheroField.setText('One Punch Man')\nsuperheroField.addToPage(page, { x: 55, y: 640 })\n\n// Add the rocket radio group, labels, and description\npage.drawText('Select your favorite rocket:', { x: 50, y: 600, size: 20 })\n\npage.drawText('Falcon Heavy', { x: 120, y: 560, size: 18 })\npage.drawText('Saturn IV', { x: 120, y: 500, size: 18 })\npage.drawText('Delta IV Heavy', { x: 340, y: 560, size: 18 })\npage.drawText('Space Launch System', { x: 340, y: 500, size: 18 })\n\nconst rocketField = form.createRadioGroup('favorite.rocket')\nrocketField.addOptionToPage('Falcon Heavy', page, { x: 55, y: 540 })\nrocketField.addOptionToPage('Saturn IV', page, { x: 55, y: 480 })\nrocketField.addOptionToPage('Delta IV Heavy', page, { x: 275, y: 540 })\nrocketField.addOptionToPage('Space Launch System', page, { x: 275, y: 480 })\nrocketField.select('Saturn IV')\n\n// Add the gundam check boxes, labels, and description\npage.drawText('Select your favorite gundams:', { x: 50, y: 440, size: 20 })\n\npage.drawText('Exia', { x: 120, y: 400, size: 18 })\npage.drawText('Kyrios', { x: 120, y: 340, size: 18 })\npage.drawText('Virtue', { x: 340, y: 400, size: 18 })\npage.drawText('Dynames', { x: 340, y: 340, size: 18 })\n\nconst exiaField = form.createCheckBox('gundam.exia')\nconst kyriosField = form.createCheckBox('gundam.kyrios')\nconst virtueField = form.createCheckBox('gundam.virtue')\nconst dynamesField = form.createCheckBox('gundam.dynames')\n\nexiaField.addToPage(page, { x: 55, y: 380 })\nkyriosField.addToPage(page, { x: 55, y: 320 })\nvirtueField.addToPage(page, { x: 275, y: 380 })\ndynamesField.addToPage(page, { x: 275, y: 320 })\n\nexiaField.check()\ndynamesField.check()\n\n// Add the planet dropdown and description\npage.drawText('Select your favorite planet*:', { x: 50, y: 280, size: 20 })\n\nconst planetsField = form.createDropdown('favorite.planet')\nplanetsField.addOptions(['Venus', 'Earth', 'Mars', 'Pluto'])\nplanetsField.select('Pluto')\nplanetsField.addToPage(page, { x: 55, y: 220 })\n\n// Add the person option list and description\npage.drawText('Select your favorite person:', { x: 50, y: 180, size: 18 })\n\nconst personField = form.createOptionList('favorite.person')\npersonField.addOptions([\n  'Julius Caesar',\n  'Ada Lovelace',\n  'Cleopatra',\n  'Aaron Burr',\n  'Mark Antony',\n])\npersonField.select('Ada Lovelace')\npersonField.addToPage(page, { x: 55, y: 70 })\n\n// Just saying...\npage.drawText(`* Pluto should be a planet too!`, { x: 15, y: 15, size: 15 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Fill Form\n\n_This example produces [this PDF](assets/pdfs/examples/fill_form.pdf)_ (when [this PDF](assets/pdfs/dod_character.pdf) is used for the `formPdfBytes` variable, [this image](assets/images/small_mario.png) is used for the `marioImageBytes` variable, and [this image](assets/images/mario_emblem.png) is used for the `emblemImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/0mwfqkv6/3/)\n\n> See also [Creating and Filling Forms](#creating-and-filling-forms)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst formPdfBytes = ...\nconst marioImageBytes = ...\nconst emblemImageBytes = ...\n\n// Load a PDF with form fields\nconst pdfDoc = await PDFDocument.load(formPdfBytes)\n\n// Embed the Mario and emblem images\nconst marioImage = await pdfDoc.embedPng(marioImageBytes)\nconst emblemImage = await pdfDoc.embedPng(emblemImageBytes)\n\n// Get the form containing all the fields\nconst form = pdfDoc.getForm()\n\n// Get all fields in the PDF by their names\nconst nameField = form.getTextField('CharacterName 2')\nconst ageField = form.getTextField('Age')\nconst heightField = form.getTextField('Height')\nconst weightField = form.getTextField('Weight')\nconst eyesField = form.getTextField('Eyes')\nconst skinField = form.getTextField('Skin')\nconst hairField = form.getTextField('Hair')\n\nconst alliesField = form.getTextField('Allies')\nconst factionField = form.getTextField('FactionName')\nconst backstoryField = form.getTextField('Backstory')\nconst traitsField = form.getTextField('Feat+Traits')\nconst treasureField = form.getTextField('Treasure')\n\nconst characterImageField = form.getButton('CHARACTER IMAGE')\nconst factionImageField = form.getTextField('Faction Symbol Image')\n\n// Fill in the basic info fields\nnameField.setText('Mario')\nageField.setText('24 years')\nheightField.setText(`5' 1\"`)\nweightField.setText('196 lbs')\neyesField.setText('blue')\nskinField.setText('white')\nhairField.setText('brown')\n\n// Fill the character image field with our Mario image\ncharacterImageField.setImage(marioImage)\n\n// Fill in the allies field\nalliesField.setText(\n  [\n    `Allies:`,\n    `  • Princess Daisy`,\n    `  • Princess Peach`,\n    `  • Rosalina`,\n    `  • Geno`,\n    `  • Luigi`,\n    `  • Donkey Kong`,\n    `  • Yoshi`,\n    `  • Diddy Kong`,\n    ``,\n    `Organizations:`,\n    `  • Italian Plumbers Association`,\n  ].join('\\n'),\n)\n\n// Fill in the faction name field\nfactionField.setText(`Mario's Emblem`)\n\n// Fill the faction image field with our emblem image\nfactionImageField.setImage(emblemImage)\n\n// Fill in the backstory field\nbackstoryField.setText(\n  `Mario is a fictional character in the Mario video game franchise, owned by Nintendo and created by Japanese video game designer Shigeru Miyamoto. Serving as the company's mascot and the eponymous protagonist of the series, Mario has appeared in over 200 video games since his creation. Depicted as a short, pudgy, Italian plumber who resides in the Mushroom Kingdom, his adventures generally center upon rescuing Princess Peach from the Koopa villain Bowser. His younger brother and sidekick is Luigi.`,\n)\n\n// Fill in the traits field\ntraitsField.setText(\n  [\n    `Mario can use three basic three power-ups:`,\n    `  • the Super Mushroom, which causes Mario to grow larger`,\n    `  • the Fire Flower, which allows Mario to throw fireballs`,\n    `  • the Starman, which gives Mario temporary invincibility`,\n  ].join('\\n'),\n)\n\n// Fill in the treasure field\ntreasureField.setText(['• Gold coins', '• Treasure chests'].join('\\n'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Flatten Form\n\n_This example produces [this PDF](assets/pdfs/examples/flatten_form.pdf)_ (when [this PDF](assets/pdfs/form_to_flatten.pdf) is used for the `formPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/skevywdz/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst formPdfBytes = ...\n\n// Load a PDF with form fields\nconst pdfDoc = await PDFDocument.load(formPdfBytes)\n\n// Get the form containing all the fields\nconst form = pdfDoc.getForm()\n\n// Fill the form's fields\nform.getTextField('Text1').setText('Some Text');\n\nform.getRadioGroup('Group2').select('Choice1');\nform.getRadioGroup('Group3').select('Choice3');\nform.getRadioGroup('Group4').select('Choice1');\n\nform.getCheckBox('Check Box3').check();\nform.getCheckBox('Check Box4').uncheck();\n\nform.getDropdown('Dropdown7').select('Infinity');\n\nform.getOptionList('List Box6').select('Honda');\n\n// Flatten the form's fields\nform.flatten();\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Copy Pages\n\n_This example produces [this PDF](assets/pdfs/examples/copy_pages.pdf)_ (when [this PDF](assets/pdfs/with_update_sections.pdf) is used for the `firstDonorPdfBytes` variable and [this PDF](assets/pdfs/with_large_page_count.pdf) is used for the `secondDonorPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/ybank8s9/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst firstDonorPdfBytes = ...\nconst secondDonorPdfBytes = ...\n\n// Load a PDFDocument from each of the existing PDFs\nconst firstDonorPdfDoc = await PDFDocument.load(firstDonorPdfBytes)\nconst secondDonorPdfDoc = await PDFDocument.load(secondDonorPdfBytes)\n\n// Copy the 1st page from the first donor document, and\n// the 743rd page from the second donor document\nconst [firstDonorPage] = await pdfDoc.copyPages(firstDonorPdfDoc, [0])\nconst [secondDonorPage] = await pdfDoc.copyPages(secondDonorPdfDoc, [742])\n\n// Add the first copied page\npdfDoc.addPage(firstDonorPage)\n\n// Insert the second copied page to index 0, so it will be the\n// first page in `pdfDoc`\npdfDoc.insertPage(0, secondDonorPage)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PNG and JPEG Images\n\n_This example produces [this PDF](assets/pdfs/examples/embed_png_and_jpeg_images.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgImageBytes` variable and [this image](assets/images/minions_banana_alpha.png) is used for the `pngImageBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bcya43ju/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgImageBytes = ...\nconst pngImageBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the JPG image bytes and PNG image bytes\nconst jpgImage = await pdfDoc.embedJpg(jpgImageBytes)\nconst pngImage = await pdfDoc.embedPng(pngImageBytes)\n\n// Get the width/height of the JPG image scaled down to 25% of its original size\nconst jpgDims = jpgImage.scale(0.25)\n\n// Get the width/height of the PNG image scaled down to 50% of its original size\nconst pngDims = pngImage.scale(0.5)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the JPG image in the center of the page\npage.drawImage(jpgImage, {\n  x: page.getWidth() / 2 - jpgDims.width / 2,\n  y: page.getHeight() / 2 - jpgDims.height / 2,\n  width: jpgDims.width,\n  height: jpgDims.height,\n})\n\n// Draw the PNG image near the lower right corner of the JPG image\npage.drawImage(pngImage, {\n  x: page.getWidth() / 2 - pngDims.width / 2 + 75,\n  y: page.getHeight() / 2 - pngDims.height,\n  width: pngDims.width,\n  height: pngDims.height,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed PDF Pages\n\n_This example produces [this PDF](assets/pdfs/examples/embed_pdf_pages.pdf)_ (when [this PDF](assets/pdfs/american_flag.pdf) is used for the `americanFlagPdfBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `usConstitutionPdfBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/Lyb16ocj/13/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst americanFlagPdfBytes = ...\nconst usConstitutionPdfBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the American flag PDF bytes\nconst [americanFlag] = await pdfDoc.embedPdf(americanFlagPdfBytes)\n\n// Load the U.S. constitution PDF bytes\nconst usConstitutionPdf = await PDFDocument.load(usConstitutionPdfBytes)\n\n// Embed the second page of the constitution and clip the preamble\nconst preamble = await pdfDoc.embedPage(usConstitutionPdf.getPages()[1], {\n  left: 55,\n  bottom: 485,\n  right: 300,\n  top: 575,\n})\n\n// Get the width/height of the American flag PDF scaled down to 30% of\n// its original size\nconst americanFlagDims = americanFlag.scale(0.3)\n\n// Get the width/height of the preamble clipping scaled up to 225% of\n// its original size\nconst preambleDims = preamble.scale(2.25)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Draw the American flag image in the center top of the page\npage.drawPage(americanFlag, {\n  ...americanFlagDims,\n  x: page.getWidth() / 2 - americanFlagDims.width / 2,\n  y: page.getHeight() - americanFlagDims.height - 150,\n})\n\n// Draw the preamble clipping in the center bottom of the page\npage.drawPage(preamble, {\n  ...preambleDims,\n  x: page.getWidth() / 2 - preambleDims.width / 2,\n  y: page.getHeight() / 2 - preambleDims.height / 2 - 50,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Embed Font and Measure Text\n\n`pdf-lib` relies on a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts.\n\n> **[See below for detailed installation instructions on installing `@pdf-lib/fontkit` as a UMD or NPM module.](#fontkit-installation)**\n\n_This example produces [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf)_ (when [this font](assets/fonts/ubuntu/Ubuntu-R.ttf) is used for the `fontBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/rgu6ca59/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If you're running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst fontBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Register the `fontkit` instance\npdfDoc.registerFontkit(fontkit)\n\n// Embed our custom font in the document\nconst customFont = await pdfDoc.embedFont(fontBytes)\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\n\n// Create a string of text and measure its width and height in our custom font\nconst text = 'This is text in an embedded font!'\nconst textSize = 35\nconst textWidth = customFont.widthOfTextAtSize(text, textSize)\nconst textHeight = customFont.heightAtSize(textSize)\n\n// Draw the string of text on the page\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n})\n\n// Draw a box around the string of text\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n})\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Add Attachments\n\n_This example produces [this PDF](assets/pdfs/examples/add_attachments.pdf)_ (when [this image](assets/images/cat_riding_unicorn.jpg) is used for the `jpgAttachmentBytes` variable and [this PDF](assets/pdfs/us_constitution.pdf) is used for the `pdfAttachmentBytes` variable).\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/9snL63wj/5/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// These should be Uint8Arrays or ArrayBuffers\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst jpgAttachmentBytes = ...\nconst pdfAttachmentBytes = ...\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add the JPG attachment\nawait pdfDoc.attach(jpgAttachmentBytes, 'cat_riding_unicorn.jpg', {\n  mimeType: 'image/jpeg',\n  description: 'Cool cat riding a unicorn! 🦄🐈🕶️',\n  creationDate: new Date('2019/12/01'),\n  modificationDate: new Date('2020/04/19'),\n})\n\n// Add the PDF attachment\nawait pdfDoc.attach(pdfAttachmentBytes, 'us_constitution.pdf', {\n  mimeType: 'application/pdf',\n  description: 'Constitution of the United States 🇺🇸🦅',\n  creationDate: new Date('1787/09/17'),\n  modificationDate: new Date('1992/05/07'),\n})\n\n// Add a page with some text\nconst page = pdfDoc.addPage();\npage.drawText('This PDF has two attachments', { x: 135, y: 415 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Set Document Metadata\n\n_This example produces [this PDF](assets/pdfs/examples/set_document_metadata.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/vcwmfnbe/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, StandardFonts } from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available metadata fields on the PDFDocument. Note that these fields\n// are visible in the \"Document Properties\" section of most PDF readers.\npdfDoc.setTitle('🥚 The Life of an Egg 🍳')\npdfDoc.setAuthor('Humpty Dumpty')\npdfDoc.setSubject('📘 An Epic Tale of Woe 📖')\npdfDoc.setKeywords(['eggs', 'wall', 'fall', 'king', 'horses', 'men'])\npdfDoc.setProducer('PDF App 9000 🤖')\npdfDoc.setCreator('pdf-lib (https://github.com/Hopding/pdf-lib)')\npdfDoc.setCreationDate(new Date('2018-06-24T01:58:37.228Z'))\npdfDoc.setModificationDate(new Date('2019-12-21T07:00:11.000Z'))\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Read Document Metadata\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/eg8rfz3k/16/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument without updating its existing metadata\nconst pdfDoc = await PDFDocument.load(existingPdfBytes, {\n  updateMetadata: false\n})\n\n// Print all available metadata fields\nconsole.log('Title:', pdfDoc.getTitle())\nconsole.log('Author:', pdfDoc.getAuthor())\nconsole.log('Subject:', pdfDoc.getSubject())\nconsole.log('Creator:', pdfDoc.getCreator())\nconsole.log('Keywords:', pdfDoc.getKeywords())\nconsole.log('Producer:', pdfDoc.getProducer())\nconsole.log('Creation Date:', pdfDoc.getCreationDate())\nconsole.log('Modification Date:', pdfDoc.getModificationDate())\n```\n\nThis script outputs the following (_when [this PDF](assets/pdfs/with_cropbox.pdf) is used for the `existingPdfBytes` variable_):\n\n```\nTitle: Microsoft Word - Basic Curriculum Vitae example.doc\nAuthor: Administrator\nSubject: undefined\nCreator: PScript5.dll Version 5.2\nKeywords: undefined\nProducer: Acrobat Distiller 8.1.0 (Windows)\nCreation Date: 2010-07-29T14:26:00.000Z\nModification Date: 2010-07-29T14:26:00.000Z\n```\n\n### Set Viewer Preferences\n\n<!-- prettier-ignore -->\n```js\nimport {\n  PDFDocument,\n  StandardFonts,\n  NonFullScreenPageMode,\n  ReadingDirection,\n  PrintScaling,\n  Duplex,\n  PDFName,\n} from 'pdf-lib'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Embed the Times Roman font\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman)\n\n// Add a page and draw some text on it\nconst page = pdfDoc.addPage([500, 600])\npage.setFont(timesRomanFont)\npage.drawText('The Life of an Egg', { x: 60, y: 500, size: 50 })\npage.drawText('An Epic Tale of Woe', { x: 125, y: 460, size: 25 })\n\n// Set all available viewer preferences on the PDFDocument:\nconst viewerPrefs = pdfDoc.catalog.getOrCreateViewerPreferences()\nviewerPrefs.setHideToolbar(true)\nviewerPrefs.setHideMenubar(true)\nviewerPrefs.setHideWindowUI(true)\nviewerPrefs.setFitWindow(true)\nviewerPrefs.setCenterWindow(true)\nviewerPrefs.setDisplayDocTitle(true)\n\n// Set the PageMode (otherwise setting NonFullScreenPageMode has no meaning)\npdfDoc.catalog.set(PDFName.of('PageMode'), PDFName.of('FullScreen'))\n\n// Set what happens when fullScreen is closed\nviewerPrefs.setNonFullScreenPageMode(NonFullScreenPageMode.UseOutlines)\n\nviewerPrefs.setReadingDirection(ReadingDirection.L2R)\nviewerPrefs.setPrintScaling(PrintScaling.None)\nviewerPrefs.setDuplex(Duplex.DuplexFlipLongEdge)\nviewerPrefs.setPickTrayByPDFSize(true)\n\n// We can set the default print range to only the first page\nviewerPrefs.setPrintPageRange({ start: 0, end: 0 })\n\n// Or we can supply noncontiguous ranges (e.g. pages 1, 3, and 5-7)\nviewerPrefs.setPrintPageRange([\n  { start: 0, end: 0 },\n  { start: 2, end: 2 },\n  { start: 4, end: 6 },\n])\n\nviewerPrefs.setNumCopies(2)\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n### Read Viewer Preferences\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\n\n// This should be a Uint8Array or ArrayBuffer\n// This data can be obtained in a number of different ways\n// If your running in a Node environment, you could use fs.readFile()\n// In the browser, you could make a fetch() call and use res.arrayBuffer()\nconst existingPdfBytes = ...\n\n// Load a PDFDocument without updating its existing metadata\nconst pdfDoc = await PDFDocument.load(existingPdfBytes)\nconst viewerPrefs = pdfDoc.catalog.getOrCreateViewerPreferences()\n\n// Print all available viewer preference fields\nconsole.log('HideToolbar:', viewerPrefs.getHideToolbar())\nconsole.log('HideMenubar:', viewerPrefs.getHideMenubar())\nconsole.log('HideWindowUI:', viewerPrefs.getHideWindowUI())\nconsole.log('FitWindow:', viewerPrefs.getFitWindow())\nconsole.log('CenterWindow:', viewerPrefs.getCenterWindow())\nconsole.log('DisplayDocTitle:', viewerPrefs.getDisplayDocTitle())\nconsole.log('NonFullScreenPageMode:', viewerPrefs.getNonFullScreenPageMode())\nconsole.log('ReadingDirection:', viewerPrefs.getReadingDirection())\nconsole.log('PrintScaling:', viewerPrefs.getPrintScaling())\nconsole.log('Duplex:', viewerPrefs.getDuplex())\nconsole.log('PickTrayByPDFSize:', viewerPrefs.getPickTrayByPDFSize())\nconsole.log('PrintPageRange:', viewerPrefs.getPrintPageRange())\nconsole.log('NumCopies:', viewerPrefs.getNumCopies())\n```\n\nThis script outputs the following (_when [this PDF](assets/pdfs/with_viewer_prefs.pdf) is used for the `existingPdfBytes` variable_):\n\n```\nHideToolbar: true\nHideMenubar: true\nHideWindowUI: false\nFitWindow: true\nCenterWindow: true\nDisplayDocTitle: true\nNonFullScreenPageMode: UseNone\nReadingDirection: R2L\nPrintScaling: None\nDuplex: DuplexFlipLongEdge\nPickTrayByPDFSize: true\nPrintPageRange: [ { start: 1, end: 1 }, { start: 3, end: 4 } ]\nNumCopies: 2\n```\n\n### Draw SVG Paths\n\n_This example produces [this PDF](assets/pdfs/examples/draw_svg_paths.pdf)_.\n\n[Try the JSFiddle demo](https://jsfiddle.net/Hopding/bwaomr9h/2/)\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, rgb } from 'pdf-lib'\n\n// SVG path for a wavy line\nconst svgPath =\n  'M 0,20 L 100,160 Q 130,200 150,120 C 190,-40 200,200 300,150 L 400,90'\n\n// Create a new PDFDocument\nconst pdfDoc = await PDFDocument.create()\n\n// Add a blank page to the document\nconst page = pdfDoc.addPage()\npage.moveTo(100, page.getHeight() - 5)\n\n// Draw the SVG path as a black line\npage.moveDown(25)\npage.drawSvgPath(svgPath)\n\n// Draw the SVG path as a thick green line\npage.moveDown(200)\npage.drawSvgPath(svgPath, { borderColor: rgb(0, 1, 0), borderWidth: 5 })\n\n// Draw the SVG path and fill it with red\npage.moveDown(200)\npage.drawSvgPath(svgPath, { color: rgb(1, 0, 0) })\n\n// Draw the SVG path at 50% of its original size\npage.moveDown(200)\npage.drawSvgPath(svgPath, { scale: 0.5 })\n\n// Serialize the PDFDocument to bytes (a Uint8Array)\nconst pdfBytes = await pdfDoc.save()\n\n// For example, `pdfBytes` can be:\n//   • Written to a file in Node\n//   • Downloaded from the browser\n//   • Rendered in an <iframe>\n```\n\n## Deno Usage\n\n`pdf-lib` fully supports the exciting new [Deno](https://deno.land/) runtime! All of the [usage examples](#usage-examples) work in Deno. The only thing you need to do is change the imports for `pdf-lib` and `@pdf-lib/fontkit` to use the [Skypack](https://www.skypack.dev/) CDN, because Deno requires all modules to be referenced via URLs.\n\n> **See also [How to Create and Modify PDF Files in Deno With pdf-lib](https://medium.com/swlh/how-to-create-and-modify-pdf-files-in-deno-ffaad7099b0?source=friends_link&sk=3da183bb776d059df428eaea52102f19)**\n\n### Creating a Document with Deno\n\nBelow is the [**create document**](#create-document) example modified for Deno:\n\n```js\nimport {\n  PDFDocument,\n  StandardFonts,\n  rgb,\n} from 'https://cdn.skypack.dev/pdf-lib@^1.11.1?dts';\n\nconst pdfDoc = await PDFDocument.create();\nconst timesRomanFont = await pdfDoc.embedFont(StandardFonts.TimesRoman);\n\nconst page = pdfDoc.addPage();\nconst { width, height } = page.getSize();\nconst fontSize = 30;\npage.drawText('Creating PDFs in JavaScript is awesome!', {\n  x: 50,\n  y: height - 4 * fontSize,\n  size: fontSize,\n  font: timesRomanFont,\n  color: rgb(0, 0.53, 0.71),\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `create-document.ts`, you can execute it using Deno with the following command:\n\n```\ndeno run --allow-write create-document.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/create_document.pdf).\n\n### Embedding a Font with Deno\n\nHere's a slightly more complicated example demonstrating how to embed a font and measure text in Deno:\n\n```js\nimport {\n  degrees,\n  PDFDocument,\n  rgb,\n  StandardFonts,\n} from 'https://cdn.skypack.dev/pdf-lib@^1.11.1?dts';\nimport fontkit from 'https://cdn.skypack.dev/@pdf-lib/fontkit@^1.0.0?dts';\n\nconst url = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf';\nconst fontBytes = await fetch(url).then((res) => res.arrayBuffer());\n\nconst pdfDoc = await PDFDocument.create();\n\npdfDoc.registerFontkit(fontkit);\nconst customFont = await pdfDoc.embedFont(fontBytes);\n\nconst page = pdfDoc.addPage();\n\nconst text = 'This is text in an embedded font!';\nconst textSize = 35;\nconst textWidth = customFont.widthOfTextAtSize(text, textSize);\nconst textHeight = customFont.heightAtSize(textSize);\n\npage.drawText(text, {\n  x: 40,\n  y: 450,\n  size: textSize,\n  font: customFont,\n  color: rgb(0, 0.53, 0.71),\n});\npage.drawRectangle({\n  x: 40,\n  y: 450,\n  width: textWidth,\n  height: textHeight,\n  borderColor: rgb(1, 0, 0),\n  borderWidth: 1.5,\n});\n\nconst pdfBytes = await pdfDoc.save();\n\nawait Deno.writeFile('out.pdf', pdfBytes);\n```\n\nIf you save this script as `custom-font.ts`, you can execute it with the following command:\n\n```\ndeno run --allow-write --allow-net custom-font.ts\n```\n\nThe resulting `out.pdf` file will look like [this PDF](assets/pdfs/examples/embed_font_and_measure_text.pdf).\n\n## Complete Examples\n\nThe [usage examples](#usage-examples) provide code that is brief and to the point, demonstrating the different features of `pdf-lib`. You can find complete working examples in the [`apps/`](apps/) directory. These apps are used to do manual testing of `pdf-lib` before every release (in addition to the [automated tests](tests/)).\n\nThere are currently four apps:\n\n- [**`node`**](apps/node/) - contains [tests](apps/node/tests/) for `pdf-lib` in Node environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem. They also allow you to quickly open your PDFs in different viewers (Acrobat, Preview, Foxit, Chrome, Firefox, etc...) to ensure compatibility.\n- [**`web`**](apps/web/) - contains [tests](apps/web/) for `pdf-lib` in browser environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a browser environment.\n- [**`rn`**](apps/rn) - contains [tests](apps/rn/src/tests/) for `pdf-lib` in React Native environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` in a React Native environment.\n- [**`deno`**](apps/deno) - contains [tests](apps/deno/tests/) for `pdf-lib` in Deno environments. These tests are a handy reference when trying to save/load PDFs, fonts, or images with `pdf-lib` from the filesystem.\n\n## Installation\n\n### NPM Module\n\nTo install the latest stable version:\n\n```bash\n# With npm\nnpm install --save pdf-lib\n\n# With yarn\nyarn add pdf-lib\n```\n\nThis assumes you're using [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/lang/en/) as your package manager.\n\n### UMD Module\n\nYou can also download `pdf-lib` as a UMD module from [unpkg](https://unpkg.com/#/) or [jsDelivr](https://www.jsdelivr.com/). The UMD builds have been compiled to ES5, so they should work [in any modern browser](https://caniuse.com/#feat=es5). UMD builds are useful if you aren't using a package manager or module bundler. For example, you can use them directly in the `<script>` tag of an HTML page.\n\nThe following builds are available:\n\n- https://unpkg.com/pdf-lib/dist/pdf-lib.js\n- https://unpkg.com/pdf-lib/dist/pdf-lib.min.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.js\n- https://cdn.jsdelivr.net/npm/pdf-lib/dist/pdf-lib.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/pdf-lib@1.4.0/dist/pdf-lib.min.js\n> - https://cdn.jsdelivr.net/npm/pdf-lib@1.4.0/dist/pdf-lib.min.js\n\nWhen using a UMD build, you will have access to a global `window.PDFLib` variable. This variable contains all of the classes and functions exported by `pdf-lib`. For example:\n\n```javascript\n// NPM module\nimport { PDFDocument, rgb } from 'pdf-lib';\n\n// UMD module\nvar PDFDocument = PDFLib.PDFDocument;\nvar rgb = PDFLib.rgb;\n```\n\n## Fontkit Installation\n\n`pdf-lib` relies upon a sister module to support embedding custom fonts: [`@pdf-lib/fontkit`](https://www.npmjs.com/package/@pdf-lib/fontkit). You must add the `@pdf-lib/fontkit` module to your project and register it using `pdfDoc.registerFontkit(...)` before embedding custom fonts (see the [font embedding example](#embed-font-and-measure-text)). This module is not included by default because not all users need it, and it increases bundle size.\n\nInstalling this module is easy. Just like `pdf-lib` itself, `@pdf-lib/fontkit` can be installed with `npm`/`yarn` or as a UMD module.\n\n### Fontkit NPM Module\n\n```bash\n# With npm\nnpm install --save @pdf-lib/fontkit\n\n# With yarn\nyarn add @pdf-lib/fontkit\n```\n\nTo register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument } from 'pdf-lib'\nimport fontkit from '@pdf-lib/fontkit'\n\nconst pdfDoc = await PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n### Fontkit UMD Module\n\nThe following builds are available:\n\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.js\n- https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit/dist/fontkit.umd.min.js\n\n> **NOTE:** if you are using the CDN scripts in production, you should include a specific version number in the URL, for example:\n>\n> - https://unpkg.com/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n> - https://cdn.jsdelivr.net/npm/@pdf-lib/fontkit@0.0.4/dist/fontkit.umd.min.js\n\nWhen using a UMD build, you will have access to a global `window.fontkit` variable. To register the `fontkit` instance:\n\n<!-- prettier-ignore -->\n```js\nvar pdfDoc = await PDFLib.PDFDocument.create()\npdfDoc.registerFontkit(fontkit)\n```\n\n## Documentation\n\nAPI documentation is available on the project site at https://pdf-lib.js.org/docs/api/.\n\nThe repo for the project site (and generated documentation files) is\nlocated here: https://github.com/Hopding/pdf-lib-docs.\n\n## Fonts and Unicode\n\nWhen working with PDFs, you will frequently come across the terms \"character encoding\" and \"font\". If you have experience in web development, you may wonder why these are so prevalent. Aren't they just annoying details that you shouldn't need to worry about? Shouldn't PDF libraries and readers be able to handle all of this for you like web browsers can? Unfortunately, this is not the case. The nature of the PDF file format makes it very difficult to avoid thinking about character encodings and fonts when working with PDFs.\n\n`pdf-lib` does its best to simplify things for you. But it can't perform magic. This means you should be aware of the following:\n\n- **There are 14 standard fonts** defined in the PDF specification. They are as follows: _Times Roman_ (normal, bold, and italic), _Helvetica_ (normal, bold, and italic), _Courier_ (normal, bold, and italic), _ZapfDingbats_ (normal), and _Symbol_ (normal). These 14 fonts are guaranteed to be available in PDF readers. As such, you do not need to embed any font data if you wish to use one of these fonts. You can use a standard font like so:\n  <!-- prettier-ignore -->\n  ```js\n  import { PDFDocument, StandardFonts } from 'pdf-lib'\n  const pdfDoc = await PDFDocument.create()\n  const courierFont = await pdfDoc.embedFont(StandardFonts.Courier)\n  const page = pdfDoc.addPage()\n  page.drawText('Some boring latin text in the Courier font', {\n    font: courierFont,\n  })\n  ```\n- **The standard fonts do not support all characters** available in Unicode. The Times Roman, Helvetica, and Courier fonts use WinAnsi encoding (aka [Windows-1252](https://en.wikipedia.org/wiki/Windows-1252)). The WinAnsi character set only supports 218 characters in the Latin alphabet. For this reason, many users will find the standard fonts insufficient for their use case. This is unfortunate, but there's nothing that PDF libraries can do to change this. This is a result of the PDF specification and its age. Note that the [ZapfDingbats](https://en.wikipedia.org/wiki/Zapf_Dingbats) and [Symbol](<https://en.wikipedia.org/wiki/Symbol_(typeface)>) fonts use their own specialized encodings that support 203 and 194 characters, respectively. However, the characters they support are not useful for most use cases. See [here](assets/pdfs/standard_fonts_demo.pdf) for an example of all 14 standard fonts.\n- **You can use characters outside the Latin alphabet** by embedding your own fonts. Embedding your own font requires to you load the font data (from a file or via a network request, for example) and pass it to the `embedFont` method. When you embed your own font, you can use any Unicode characters that it supports. This capability frees you from the limitations imposed by the standard fonts. Most PDF files use embedded fonts. You can embed and use a custom font like so ([see also](#embed-font-and-measure-text)):\n  <!-- prettier-ignore -->\n  ```js\n  import { PDFDocument } from 'pdf-lib'\n  import fontkit from '@pdf-lib/fontkit'\n\n  const url = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf'\n  const fontBytes = await fetch(url).then((res) => res.arrayBuffer())\n\n  const pdfDoc = await PDFDocument.create()\n\n  pdfDoc.registerFontkit(fontkit)\n  const ubuntuFont = await pdfDoc.embedFont(fontBytes)\n\n  const page = pdfDoc.addPage()\n  page.drawText('Some fancy Unicode text in the ŪЬȕǹƚü font', {\n    font: ubuntuFont,\n  })\n  ```\n\nNote that encoding errors will be thrown if you try to use a character with a font that does not support it. For example, `Ω` is not in the WinAnsi character set. So trying to draw it on a page with the standard Helvetica font will throw the following error:\n\n```\nError: WinAnsi cannot encode \"Ω\" (0x03a9)\n    at Encoding.encodeUnicodeCodePoint\n```\n\n### Font Subsetting\n\nEmbedding a font in a PDF document will typically increase the file's size. You can reduce the amount a file's size is increased by subsetting the font so that only the necessary characters are embedded. You can subset a font by setting the [`subset` option](https://pdf-lib.js.org/docs/api/interfaces/embedfontoptions#optional-subset) to `true`. For example:\n\n```js\nconst font = await pdfDoc.embedFont(fontBytes, { subset: true });\n```\n\nNote that subsetting does not work for all fonts. See https://github.com/Hopding/pdf-lib/issues/207#issuecomment-537210471 for additional details.\n\n## Creating and Filling Forms\n\n`pdf-lib` can create, fill, and read PDF form fields. The following field types are supported:\n\n- [Buttons](https://pdf-lib.js.org/docs/api/classes/pdfbutton)\n- [Check Boxes](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox)\n- [Dropdowns](https://pdf-lib.js.org/docs/api/classes/pdfdropdown)\n- [Option Lists](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist)\n- [Radio Groups](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup)\n- [Text Fields](https://pdf-lib.js.org/docs/api/classes/pdftextfield)\n\nSee the [form creation](#create-form) and [form filling](#fill-form) usage examples for code samples. Tests 1, 14, 15, 16, and 17 in the [complete examples](#complete-examples) contain working example code for form creation and filling in a variety of different JS environments.\n\n**IMPORTANT:** The default font used to display text in buttons, dropdowns, option lists, and text fields is the standard Helvetica font. This font only supports characters in the latin alphabet (see [Fonts and Unicode](#fonts-and-unicode) for details). This means that if any of these field types are created or modified to contain text outside the latin alphabet (as is often the case), you will need to embed and use a custom font to update the field appearances. Otherwise an error will be thrown (likely when you save the `PDFDocument`).\n\nYou can use an embedded font when filling form fields as follows:\n\n```js\nimport { PDFDocument } from 'pdf-lib';\nimport fontkit from '@pdf-lib/fontkit';\n\n// Fetch the PDF with form fields\nconst formUrl = 'https://pdf-lib.js.org/assets/dod_character.pdf';\nconst formBytes = await fetch(formUrl).then((res) => res.arrayBuffer());\n\n// Fetch the Ubuntu font\nconst fontUrl = 'https://pdf-lib.js.org/assets/ubuntu/Ubuntu-R.ttf';\nconst fontBytes = await fetch(fontUrl).then((res) => res.arrayBuffer());\n\n// Load the PDF with form fields\nconst pdfDoc = await PDFDocument.load(formBytes);\n\n// Embed the Ubuntu font\npdfDoc.registerFontkit(fontkit);\nconst ubuntuFont = await pdfDoc.embedFont(fontBytes);\n\n// Get two text fields from the form\nconst form = pdfDoc.getForm();\nconst nameField = form.getTextField('CharacterName 2');\nconst ageField = form.getTextField('Age');\n\n// Fill the text fields with some fancy Unicode characters (outside\n// the WinAnsi latin character set)\nnameField.setText('Ӎӑȑїõ');\nageField.setText('24 ŷȇȁŗš');\n\n// **Key Step:** Update the field appearances with the Ubuntu font\nform.updateFieldAppearances(ubuntuFont);\n\n// Save the PDF with filled form fields\nconst pdfBytes = await pdfDoc.save();\n```\n\n### Handy Methods for Filling, Creating, and Reading Form Fields\n\nExisting form fields can be accessed with the following methods of [`PDFForm`](https://pdf-lib.js.org/docs/api/classes/pdfform):\n\n- [`PDFForm.getButton`](https://pdf-lib.js.org/docs/api/classes/pdfform#getbutton)\n- [`PDFForm.getCheckBox`](https://pdf-lib.js.org/docs/api/classes/pdfform#getcheckbox)\n- [`PDFForm.getDropdown`](https://pdf-lib.js.org/docs/api/classes/pdfform#getdropdown)\n- [`PDFForm.getOptionList`](https://pdf-lib.js.org/docs/api/classes/pdfform#getoptionlist)\n- [`PDFForm.getRadioGroup`](https://pdf-lib.js.org/docs/api/classes/pdfform#getradiogroup)\n- [`PDFForm.getTextField`](https://pdf-lib.js.org/docs/api/classes/pdfform#gettextfield)\n\nNew form fields can be created with the following methods of [`PDFForm`](https://pdf-lib.js.org/docs/api/classes/pdfform):\n\n- [`PDFForm.createButton`](https://pdf-lib.js.org/docs/api/classes/pdfform#createbutton)\n- [`PDFForm.createCheckBox`](https://pdf-lib.js.org/docs/api/classes/pdfform#createcheckbox)\n- [`PDFForm.createDropdown`](https://pdf-lib.js.org/docs/api/classes/pdfform#createdropdown)\n- [`PDFForm.createOptionList`](https://pdf-lib.js.org/docs/api/classes/pdfform#createoptionlist)\n- [`PDFForm.createRadioGroup`](https://pdf-lib.js.org/docs/api/classes/pdfform#createradiogroup)\n- [`PDFForm.createTextField`](https://pdf-lib.js.org/docs/api/classes/pdfform#createtextfield)\n\nBelow are some of the most commonly used methods for reading and filling the aforementioned subclasses of [`PDFField`](https://pdf-lib.js.org/docs/api/classes/pdffield):\n\n- [`PDFCheckBox.check`](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox#check)\n- [`PDFCheckBox.uncheck`](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox#uncheck)\n- [`PDFCheckBox.isChecked`](https://pdf-lib.js.org/docs/api/classes/pdfcheckbox#ischecked)\n\n---\n\n- [`PDFDropdown.select`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#select)\n- [`PDFDropdown.clear`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#clear)\n- [`PDFDropdown.getSelected`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#getselected)\n- [`PDFDropdown.getOptions`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#getoptions)\n- [`PDFDropdown.addOptions`](https://pdf-lib.js.org/docs/api/classes/pdfdropdown#addoptions)\n\n---\n\n- [`PDFOptionList.select`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#select)\n- [`PDFOptionList.clear`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#clear)\n- [`PDFOptionList.getSelected`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#getselected)\n- [`PDFOptionList.getOptions`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#getoptions)\n- [`PDFOptionList.addOptions`](https://pdf-lib.js.org/docs/api/classes/pdfoptionlist#addoptions)\n\n---\n\n- [`PDFRadioGroup.select`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#select)\n- [`PDFRadioGroup.clear`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#clear)\n- [`PDFRadioGroup.getSelected`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#getselected)\n- [`PDFRadioGroup.getOptions`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#getoptions)\n- [`PDFRadioGroup.addOptionToPage`](https://pdf-lib.js.org/docs/api/classes/pdfradiogroup#addoptiontopage)\n\n---\n\n- [`PDFTextField.setText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#settext)\n- [`PDFTextField.getText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#gettext)\n- [`PDFTextField.setMaxLength`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#setmaxlength)\n- [`PDFTextField.getMaxLength`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#getmaxlength)\n- [`PDFTextField.removeMaxLength`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#removemaxlength)\n\n## Limitations\n\n- `pdf-lib` **can** extract the content of text fields (see [`PDFTextField.getText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#gettext)), but it **cannot** extract plain text on a page outside of a form field. This is a difficult feature to implement, but it is within the scope of this library and may be added to `pdf-lib` in the future. See\n  [#93](https://github.com/Hopding/pdf-lib/issues/93),\n  [#137](https://github.com/Hopding/pdf-lib/issues/137),\n  [#177](https://github.com/Hopding/pdf-lib/issues/177),\n  [#329](https://github.com/Hopding/pdf-lib/issues/329), and\n  [#380](https://github.com/Hopding/pdf-lib/issues/380).\n- `pdf-lib` **can** remove and edit the content of text fields (see [`PDFTextField.setText`](https://pdf-lib.js.org/docs/api/classes/pdftextfield#settext)), but it does **not** provide APIs for removing or editing text on a page outside of a form field. This is also a difficult feature to implement, but is within the scope of `pdf-lib` and may be added in the future. See\n  [#93](https://github.com/Hopding/pdf-lib/issues/93),\n  [#137](https://github.com/Hopding/pdf-lib/issues/137),\n  [#177](https://github.com/Hopding/pdf-lib/issues/177),\n  [#329](https://github.com/Hopding/pdf-lib/issues/329), and\n  [#380](https://github.com/Hopding/pdf-lib/issues/380).\n- `pdf-lib` does **not** support the use of HTML or CSS when adding content to a PDF. Similarly, `pdf-lib` **cannot** embed HTML/CSS content into PDFs. As convenient as such a feature might be, it would be extremely difficult to implement and is far beyond the scope of this library. If this capability is something you need, consider using [Puppeteer](https://github.com/puppeteer/puppeteer).\n\n## Help and Discussion\n\n[Discussions](https://github.com/Hopding/pdf-lib/discussions) is the best place to chat with us, ask questions, and learn more about pdf-lib!\n\nSee also [MAINTAINERSHIP.md#communication](docs/MAINTAINERSHIP.md#communication) and [MAINTAINERSHIP.md#discord](docs/MAINTAINERSHIP.md#discord).\n\n## Encryption Handling\n\n**`pdf-lib` does not currently support encrypted documents.** You should not use `pdf-lib` with encrypted documents. However, this is a feature that could be added to `pdf-lib`. Please [create an issue](https://github.com/Hopding/pdf-lib/issues/new) if you would find this feature helpful!\n\nWhen an encrypted document is passed to `PDFDocument.load(...)`, an error will be thrown:\n\n<!-- prettier-ignore -->\n```js\nimport { PDFDocument, EncryptedPDFError } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment fails. Throws an `EncryptedPDFError`.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes)\n```\n\nThis default behavior is usually what you want. It allows you to easily detect if a given document is encrypted, and it prevents you from trying to modify it. However, if you really want to load the document, you can use the `{ ignoreEncryption: true }` option:\n\n```js\nimport { PDFDocument } from 'pdf-lib'\n\nconst encryptedPdfBytes = ...\n\n// Assignment succeeds. Does not throw an error.\nconst pdfDoc = PDFDocument.load(encryptedPdfBytes, { ignoreEncryption: true })\n```\n\nNote that **using this option does not decrypt the document**. This means that any modifications you attempt to make on the returned `PDFDocument` may fail, or have unexpected results.\n\n**You should not use this option.** It only exists for backwards compatibility reasons.\n\n## Contributing\n\nWe welcome contributions from the open source community! If you are interested in contributing to `pdf-lib`, please take a look at the [CONTRIBUTING.md](docs/CONTRIBUTING.md) file. It contains information to help you get `pdf-lib` setup and running on your machine. (We try to make this as simple and fast as possible! :rocket:)\n\n## Maintainership\n\nCheck out [MAINTAINERSHIP.md](docs/MAINTAINERSHIP.md) for details on how this repo is maintained and how we use [issues](docs/MAINTAINERSHIP.md#issues), [PRs](docs/MAINTAINERSHIP.md#pull-requests), and [discussions](docs/MAINTAINERSHIP.md#discussions).\n\n## Tutorials and Cool Stuff\n\n- [labelmake](https://github.com/hand-dot/labelmake) - a library for declarative PDF generation created by @hand-dot\n- [Möbius Printing helper](https://shreevatsa.net/mobius-print/) - a tool created by @shreevatsa\n- [Extract PDF pages](https://shreevatsa.net/pdf-pages/) - a tool created by @shreevatsa\n- [Travel certificate generator](https://github.com/LAB-MI/deplacement-covid-19) - a tool that creates travel certificates for French citizens under quarantine due to COVID-19\n- [How to use pdf-lib in AWS Lambdas](https://medium.com/swlh/create-pdf-using-pdf-lib-on-serverless-aws-lambda-e9506246dc88) - a tutorial written by Crespo Wang\n- [Working With PDFs in Node.js Using pdf-lib](http://thecodebarbarian.com/working-with-pdfs-in-node-js.html) - a tutorial by Valeri Karpov\n- [Electron app for resizing PDFs](https://github.com/vegarringdal/simple-pdf-resizer) - a tool created by @vegarringdal\n- [PDF Shelter](https://pdfshelter.com) - online PDF manipulation tools by Lucas Morais\n\n## Prior Art\n\n- [`pdfkit`](https://github.com/devongovett/pdfkit) is a PDF generation library for Node and the Browser. This library was immensely helpful as a reference and existence proof when creating `pdf-lib`. `pdfkit`'s code for [font embedding](src/core/embedders/CustomFontEmbedder.ts#L17-L21), [PNG embedding](src/core/embedders/PngEmbedder.ts#L7-L11), and [JPG embedding](src/core/embedders/JpegEmbedder.ts#L25-L29) was especially useful.\n- [`pdf.js`](https://github.com/mozilla/pdf.js) is a PDF rendering library for the Browser. This library was helpful as a reference when writing `pdf-lib`'s parser. Some of the code for stream decoding was [ported directly to TypeScript](src/core/streams) for use in `pdf-lib`.\n- [`pdfbox`](https://pdfbox.apache.org/) is a PDF generation and modification library written in Java. This library was an invaluable reference when implementing form creation and filling APIs for `pdf-lib`.\n- [`jspdf`](https://github.com/MrRio/jsPDF) is a PDF generation library for the browser.\n- [`pdfmake`](https://github.com/bpampuch/pdfmake) is a PDF generation library for the browser.\n- [`hummus`](https://github.com/galkahana/HummusJS) is a PDF generation and modification library for Node environments. `hummus` is a Node wrapper around a [C++ library](https://github.com/galkahana/PDF-Writer), so it doesn't work in many JavaScript environments - like the Browser or React Native.\n- [`react-native-pdf-lib`](https://github.com/Hopding/react-native-pdf-lib) is a PDF generation and modification library for React Native environments. `react-native-pdf-lib` is a wrapper around [C++](https://github.com/galkahana/PDF-Writer) and [Java](https://github.com/TomRoush/PdfBox-Android) libraries.\n- [`pdfassembler`](https://github.com/DevelopingMagic/pdfassembler) is a PDF generation and modification library for Node and the browser. It requires some knowledge about the logical structure of PDF documents to use.\n\n## Git History Rewrite\n\nThis repo used to contain a file called `pdf_specification.pdf` in the root directory. This was a copy of the [PDF 1.7 specification](https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/PDF32000_2008.pdf), which is made freely available by Adobe. On 8/30/2021, we received a DMCA complaint requiring us to remove the file from this repo. Simply removing the file via a new commit to `master` was insufficient to satisfy the complaint. The file needed to be completely removed from the repo's git history. Unfortunately, the file was added over two years ago, this meant we had to rewrite the repo's git history and force push to `master` 😔.\n\n### Steps We Took\n\nWe removed the file and rewrote the repo's history using [BFG Repo-Cleaner](https://rtyley.github.io/bfg-repo-cleaner/) as outlined [here](https://docs.github.com/en/github/authenticating-to-github/keeping-your-account-and-data-secure/removing-sensitive-data-from-a-repository). For full transparency, here are the exact commands we ran:\n\n```\n$ git clone git@github.com:Hopding/pdf-lib.git\n$ cd pdf-lib\n$ rm pdf_specification.pdf\n$ git commit -am 'Remove pdf_specification.pdf'\n$ bfg --delete-files pdf_specification.pdf\n$ git reflog expire --expire=now --all && git gc --prune=now --aggressive\n$ git push --force\n```\n\n### Why Should I Care?\n\nIf you're a user of `pdf-lib`, you shouldn't care! Just keep on using `pdf-lib` like normal 😃 ✨!\n\nIf you are a `pdf-lib` developer (meaning you've forked `pdf-lib` and/or have an open PR) then this does impact you. If you forked or cloned the repo prior to 8/30/2021 then your fork's git history is out of sync with this repo's `master` branch. Unfortunately, this will likely be a headache for you to deal with. Sorry! We didn't want to rewrite the history, but there really was no alternative.\n\nIt's important to note that pdf-lib's _source code_ has not changed at all. It's exactly the same as it was before the git history rewrite. The repo still has the exact same number of commits (and even the same commit contents, except for the commit that added `pdf_specification.pdf`). What has changed are the SHAs of those commits.\n\nThe simplest way to deal with this fact is to:\n\n1. Reclone pdf-lib\n2. Manually copy any changes you've made from your old clone to the new one\n3. Use your new clone going forward\n4. Reopen your unmerged PRs using your new clone\n\nSee this [StackOverflow answer](https://stackoverflow.com/a/48268766) for a great, in depth explanation of what a git history rewrite entails.\n\n## License\n\n[MIT](LICENSE.md)\n","maintainers":[{"name":"hopding","email":"andrew.dillon.j@gmail.com"}],"time":{"modified":"2022-05-12T18:02:10.238Z","created":"2017-09-04T14:23:28.384Z","0.0.0":"2017-09-04T14:23:28.384Z","0.0.1-rc":"2018-06-17T00:58:08.515Z","0.0.1-rc2":"2018-06-17T01:07:22.976Z","0.0.1-rc3":"2018-06-17T01:14:08.661Z","0.0.1-rc5":"2018-06-17T01:29:41.871Z","0.1.0":"2018-06-17T01:41:05.197Z","0.1.1-rc":"2018-06-23T22:17:26.613Z","0.1.1-rc2":"2018-06-24T00:56:03.234Z","0.2.0":"2018-06-24T22:35:59.838Z","0.2.1-rc1":"2018-07-06T00:27:40.586Z","0.2.1-rc2":"2018-07-07T20:18:10.435Z","0.2.1":"2018-07-07T20:52:12.687Z","0.3.1-rc1":"2018-08-13T23:50:49.962Z","0.3.0-rc1":"2018-08-26T15:53:48.006Z","0.3.0-rc2":"2018-08-26T16:34:42.316Z","0.3.0-rc3":"2018-08-26T17:08:44.047Z","0.3.0":"2018-08-26T17:20:08.170Z","0.3.1-rc2":"2018-08-29T22:55:55.981Z","0.3.1-rc3":"2018-09-03T19:31:07.674Z","0.4.0-rc1":"2018-10-27T15:11:10.626Z","0.4.0":"2018-10-30T23:31:12.885Z","0.4.1-rc1":"2018-11-23T02:47:32.997Z","0.4.1":"2018-11-23T15:42:54.692Z","0.5.0-rc1":"2018-12-16T16:24:45.731Z","0.5.0":"2018-12-16T16:58:07.498Z","0.5.1-rc1":"2018-12-19T22:23:10.520Z","0.5.1-rc2":"2018-12-20T15:45:25.013Z","0.5.1-rc3":"2018-12-20T16:17:48.289Z","0.5.1":"2018-12-20T16:29:01.339Z","0.6.0-rc1":"2018-12-29T20:39:38.712Z","0.6.0-rc2":"2018-12-30T00:31:10.355Z","0.6.0":"2018-12-30T02:56:14.093Z","0.6.1-rc1":"2019-01-09T00:10:10.328Z","0.6.1-rc2":"2019-01-10T01:51:36.214Z","0.6.1-rc3":"2019-02-24T15:30:29.318Z","0.6.1-rc4":"2019-02-24T19:15:47.777Z","0.6.1":"2019-03-09T22:49:43.623Z","0.6.2-rc1":"2019-04-28T18:38:28.558Z","0.6.2-rc2":"2019-04-28T19:06:57.122Z","0.6.2-rc3":"2019-05-03T00:36:25.121Z","0.6.2-rc4":"2019-05-05T00:01:08.736Z","0.6.2":"2019-05-05T00:24:23.261Z","0.6.3-rc1":"2019-06-02T14:05:05.430Z","0.6.3":"2019-06-02T14:19:35.779Z","0.6.4-rc1":"2019-06-06T23:59:38.518Z","1.0.0-beta.1":"2019-07-07T14:25:18.815Z","1.0.0-beta.2":"2019-07-10T12:55:06.490Z","0.6.4-rc2":"2019-07-10T14:04:17.890Z","1.0.0-beta.3":"2019-07-10T22:04:12.131Z","0.6.4":"2019-07-21T00:00:50.773Z","1.0.0":"2019-07-27T23:05:00.638Z","1.0.1":"2019-08-04T17:53:56.877Z","1.1.0":"2019-09-25T23:09:14.862Z","1.1.1":"2019-09-25T23:13:24.420Z","1.2.0":"2019-10-09T02:29:26.450Z","1.2.1":"2019-10-19T14:16:44.617Z","1.3.0":"2019-12-23T00:41:26.295Z","1.3.1":"2020-01-01T17:28:22.746Z","1.3.2":"2020-02-23T01:15:43.940Z","1.4.0-rc1":"2020-02-29T15:34:25.716Z","1.4.0":"2020-02-29T15:59:56.915Z","1.4.1":"2020-03-07T16:56:15.079Z","1.5.0":"2020-04-26T18:07:58.960Z","1.5.1-rc1":"2020-04-29T00:06:04.150Z","1.5.1-rc2":"2020-05-09T20:41:15.728Z","1.6.0":"2020-05-16T15:52:00.886Z","1.6.1-rc1":"2020-05-24T17:15:47.238Z","1.6.1":"2020-05-25T15:46:13.147Z","1.7.0":"2020-05-30T16:08:28.433Z","1.8.0":"2020-06-20T15:47:03.443Z","1.9.0":"2020-06-26T23:18:55.494Z","1.10.0":"2020-08-08T16:19:50.885Z","1.11.0-rc1":"2020-08-30T14:01:54.583Z","1.11.0":"2020-09-13T20:26:05.912Z","1.11.1":"2020-09-15T23:51:31.126Z","1.11.2-rc1":"2020-09-18T22:45:05.057Z","1.11.2":"2020-10-09T22:05:09.796Z","1.12.0":"2020-11-15T15:46:21.769Z","1.13.0":"2020-12-06T20:04:48.015Z","1.14.0":"2020-12-21T17:37:34.033Z","1.14.1":"2020-12-30T00:05:16.783Z","1.15.0":"2021-01-09T22:50:11.071Z","1.16.0":"2021-01-27T01:04:15.297Z","1.17.0":"2021-10-16T21:06:33.979Z","1.17.1":"2021-11-06T22:29:49.065Z"},"repository":{"type":"git","url":"git+https://github.com/Hopding/pdf-lib.git"},"author":{"name":"Andrew 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