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PDF Reader in JavaScript
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Tim van der Meij 44e0fae9d1
Implement reproducibility for the release builds 
The release builds are currently not reproducible because ZIP files
record the modification date of files generated during the build
process, meaning that two builds from identical source code, made
at different times, result in different output.

This is undesirable because it makes detecting differences in the output
harder, for instance recently during the Gulp 5 efforts, because the
modification date differences are irrelevant and could obscure actually
important differences in the output during e.g. code changes. Moreover,
reprodicibility of build artifacts has become increasingly important;
please refer to the Reproducible Builds initiative at
https://reproducible-builds.org (note the "Why does it matter?" section
specifically) and https://reproducible-builds.org/docs/timestamps which
further explains the problem of timestamps in build artifacts.

This commit fixes the issue by configuring the ZIP file creation to use
the (fixed) date of the last Git commit for which the release is being
made. With this the build is fully reproducible so that identical source
code builds result in bit-by-bit identical output artifacts.

To improve readability we convert the compression method to take a
parameter object and use template strings where useful.
2024-06-16 20:32:55 +02:00
.github Pin GitHub actions to Node.js 21 2024-04-26 19:23:16 +02:00
docs Include the generated API documentation directly on the API page 2024-06-15 15:13:01 +02:00
examples Ensure that GenericL10n works if the locale files cannot be loaded 2024-01-31 14:07:11 +01:00
extensions Add an option to enable/disable hardware acceleration (bug 1902012) 2024-06-12 18:41:07 +02:00
external Update our OpenJPEG decoder in order to fix a malloc failure due to big image (bug 1901253) 2024-06-07 17:38:35 +02:00
l10n Update translations to the most recent versions 2024-06-11 15:13:06 +02:00
src Merge pull request #18253 from calixteman/bug1539074 2024-06-16 12:17:10 +02:00
test Compute correctly the unitsPerEm value from the fontMatrix when converting a font (bug 1539074) 2024-06-15 17:51:34 +02:00
web Merge pull request #18244 from Snuffleupagus/CSS-copyAll 2024-06-14 18:23:03 +02:00
.editorconfig Add the .mjs file-extension to the EditorConfig 2023-08-23 11:22:25 +02:00
.eslintignore Rename builder esprima fixtures to babel 2024-05-09 15:17:30 +02:00
.eslintrc Enable the no-new-symbol and require-yield ESLint rules 2024-02-11 13:27:22 +01:00
.git-blame-ignore-revs Ignore auto-formatting patches in git blame 2024-01-20 12:01:23 +01:00
.gitattributes [api-minor] Move to Fluent for the localization (bug 1858715) 2023-10-19 11:20:41 +02:00
.gitignore Include package-lock.json for reproducible builds 2018-06-02 20:29:47 +02:00
.gitpod.Dockerfile Simplifies code contributions by automating the dev setup with gitpod.io 2019-11-06 04:12:19 +00:00
.gitpod.yml Simplifies code contributions by automating the dev setup with gitpod.io 2019-11-06 04:12:19 +00:00
.mailmap Add mgol's name to AUTHORS, add .mailmap 2017-11-22 10:46:11 +01:00
.prettierignore Rename builder esprima fixtures to babel 2024-05-09 15:17:30 +02:00
.prettierrc Update npm packages 2024-01-20 09:52:57 +01:00
.stylelintignore Rename builder esprima fixtures to babel 2024-05-09 15:17:30 +02:00
.stylelintrc Enable some Stylelint color-related rules to slightly reduce file sizes 2023-10-05 17:51:21 +02:00
AUTHORS Add SehyunPark to AUTHORS 2017-11-29 22:24:08 +09:00
CODE_OF_CONDUCT.md Add Mozilla Code of Conduct file 2019-03-27 21:00:01 -07:00
EXPORT Adds ECCN response statement 2017-10-23 13:31:36 -05:00
gulpfile.mjs Implement reproducibility for the release builds 2024-06-16 20:32:55 +02:00
jsdoc.json Implement reproducibility for the JSDoc builds 2024-06-16 15:10:34 +02:00
LICENSE cleaned whitespace 2015-02-17 11:07:37 -05:00
package-lock.json Replace Wintersmith with Metalsmith 2024-06-14 20:37:13 +02:00
package.json Replace Wintersmith with Metalsmith 2024-06-14 20:37:13 +02:00
pdfjs.config Bump library version to 4.4 2024-05-30 18:56:13 +02:00
README.md Don't recommend installing gulp-cli globally in the README and on the website 2024-06-14 18:41:44 +02:00
tsconfig.json Target ES2022 when building the TypeScript definitions (issue 17932) 2024-05-24 12:14:58 +02:00

README.md

PDF.js Build Status

PDF.js is a Portable Document Format (PDF) viewer that is built with HTML5.

PDF.js is community-driven and supported by Mozilla. Our goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.

Contributing

PDF.js is an open source project and always looking for more contributors. To get involved, visit:

Feel free to stop by our Matrix room for questions or guidance.

Getting Started

Online demo

Please note that the "Modern browsers" version assumes native support for the latest JavaScript features; please also see this wiki page.

Browser Extensions

Firefox

PDF.js is built into version 19+ of Firefox.

Chrome

  • The official extension for Chrome can be installed from the Chrome Web Store. This extension is maintained by @Rob--W.
  • Build Your Own - Get the code as explained below and issue npx gulp chromium. Then open Chrome, go to Tools > Extension and load the (unpackaged) extension from the directory build/chromium.

Getting the Code

To get a local copy of the current code, clone it using git:

$ git clone https://github.com/mozilla/pdf.js.git
$ cd pdf.js

Next, install Node.js via the official package or via nvm. If everything worked out, install all dependencies for PDF.js:

$ npm install

Note

On MacOS M1/M2 you may see some node-gyp-related errors when running npm install. This is because one of our dependencies, "canvas", does not provide pre-built binaries for this platform and instead npm will try to build it from source. Please make sure to first install the necessary native dependencies using brew: https://github.com/Automattic/node-canvas#compiling.

Finally, you need to start a local web server as some browsers do not allow opening PDF files using a file:// URL. Run:

$ npx gulp server

and then you can open:

Please keep in mind that this assumes the latest version of Mozilla Firefox; refer to Building PDF.js for non-development usage of the PDF.js library.

It is also possible to view all test PDF files on the right side by opening:

Building PDF.js

In order to bundle all src/ files into two production scripts and build the generic viewer, run:

$ npx gulp generic

If you need to support older browsers, run:

$ npx gulp generic-legacy

This will generate pdf.js and pdf.worker.js in the build/generic/build/ directory (respectively build/generic-legacy/build/). Both scripts are needed but only pdf.js needs to be included since pdf.worker.js will be loaded by pdf.js. The PDF.js files are large and should be minified for production.

Using PDF.js in a web application

To use PDF.js in a web application you can choose to use a pre-built version of the library or to build it from source. We supply pre-built versions for usage with NPM and Bower under the pdfjs-dist name. For more information and examples please refer to the wiki page on this subject.

Including via a CDN

PDF.js is hosted on several free CDNs:

Learning

You can play with the PDF.js API directly from your browser using the live demos below:

More examples can be found in the examples folder. Some of them are using the pdfjs-dist package, which can be built and installed in this repo directory via npx gulp dist-install command.

For an introduction to the PDF.js code, check out the presentation by our contributor Julian Viereck:

More learning resources can be found at:

The API documentation can be found at:

Questions

Check out our FAQs and get answers to common questions:

Talk to us on Matrix:

File an issue: