探客时代
PDF.js
PDF Reader in JavaScript
README
PDF.js 
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:
+ Projects
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
features such as optional chaining, nullish coalescing,
and private class fields/methods; please also see this wiki page.
+ Modern browsers: https://mozilla.github.io/pdf.js/web/viewer.html
+ Older browsers: https://mozilla.github.io/pdf.js/legacy/web/viewer.html
Browser Extensions
Firefox
PDF.js is built into version 19+ of Firefox.
Chrome
+ Build Your Own - Get the code as explained below and issue 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. You need to install the gulp package
globally (see also gulp's getting started):
$ npm install -g gulp-cli
If everything worked out, install all dependencies for PDF.js:
$ npm install
Finally, you need to start a local web server as some browsers do not allow opening
PDF files using a file:// URL. Run:
$ gulp server
and then you can open:
+ http://localhost:8888/web/viewer.html
Please keep in mind that this requires a modern and fully up-to-date browser; 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:
+ http://localhost:8888/test/pdfs/?frame
Building PDF.js
In order to bundle all src/ files into two production scripts and build the generic
viewer, run:
$ gulp generic
If you need to support older browsers, run:
$ 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:
- https://www.jsdelivr.com/package/npm/pdfjs-dist
- https://cdnjs.com/libraries/pdf.js
- https://unpkg.com/pdfjs-dist/
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 viagulp dist-install command.
For an introduction to the PDF.js code, check out the presentation by our
contributor Julian Viereck:
+ https://www.youtube.com/watch?v=Iv15UY-4Fg8
More learning resources can be found at:
+ https://github.com/mozilla/pdf.js/wiki/Additional-Learning-Resources
The API documentation can be found at:
+ https://mozilla.github.io/pdf.js/api/
Questions
Check out our FAQs and get answers to common questions:
+ https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions
Talk to us on Matrix:
+ https://chat.mozilla.org/#/room/#pdfjs:mozilla.org
File an issue:
+ https://github.com/mozilla/pdf.js/issues/new
Follow us on Twitter: @pdfjs
+ https://twitter.com/pdfjs
