Reddit Enhancement Suite
JavaScript CSS HTML
Failed to load latest commit information.
.github no really, there's better RES support on reddit Sep 30, 2016
build use a separate build config for Firefox beta (#3475) Sep 21, 2016
changelog 5.0.3 Oct 14, 2016
chrome i18n API (#3549) Oct 24, 2016
edge i18n API (#3549) Oct 24, 2016
examples Cleanup: replace `this.options` with `module.options`, etc. (#3220) Aug 3, 2016
firefox i18n API (#3549) Oct 24, 2016
images more icon sizes for the Microsoft Store (#3190) Jul 22, 2016
lib feat(filteReddit): do not filter own posts (#3545) Oct 24, 2016
locales add temp translation to keep Transifex from erroring Oct 24, 2016
node Add tests and minor refactor for messaging (#3548) Oct 23, 2016
safari i18n API (#3549) Oct 24, 2016
utils wikiCheck: convert to addModule() Dec 12, 2015
.babelrc webpack: support for building multiple browsers Apr 25, 2016
.babelrc.json Don't ship babel-runtime in modern browsers (#3521) Oct 14, 2016
.codeclimate.yml Replace scss-lint with sass-lint (#3087) Jun 17, 2016
.editorconfig Create EditorConfig file based on project coding style May 21, 2014
.eslintignore ensure that .eslintignore does not ignore lib/utils Apr 25, 2016
.eslintrc.json Clean up some Object.{has,get}OwnPropertyNames (#3484) Oct 14, 2016
.gitignore Finish #3123: "reddit" media host, for image posts that link to comme… Jul 15, 2016
.sass-lint.yml Replace scss-lint with sass-lint (#3087) Jun 17, 2016
.travis.yml use a separate build config for Firefox beta (#3475) Sep 21, 2016 readme update, build instructions split off Apr 10, 2013 use relative link for link to changelog/ dir Sep 14, 2016 Initial notes on publishing procedures Mar 13, 2016
LICENSE Add LICENSE file (wget gpl-3.0.txt) - fixes #241 Sep 16, 2013 Update Oct 6, 2016
appveyor.yml Revert "Cache the npm cache on CI" (#3298) Aug 18, 2016
gulpfile.babel.js linting: switch from sort-imports-es6 to import/order (#2937) May 6, 2016
package.json Don't ship babel-runtime in modern browsers (#3521) Oct 14, 2016
webpack.config.babel.js use a separate build config for Firefox beta (#3475) Sep 21, 2016

Reddit Enhancement Suite

Travis Build Status AppVeyor Build Status Coverage Status Code Climate devDependency Status Chat on IRC

Reddit Enhancement Suite (RES) is a suite of modules that enhances your Reddit browsing experience.

For general documentation, visit the Reddit Enhancement Suite Wiki.


Hi there! Thanks for checking out RES on GitHub. A few important notes:

  1. RES is licensed under GPLv3, which means you're technically free to do whatever you wish in terms of redistribution as long as you maintain GPLv3 licensing. However, I ask out of courtesy that should you choose to release your own, separate distribution of RES, you please name it something else entirely. Unfortunately, I have run into problems in the past with people redistributing under the same name, and causing me tech support headaches.

  2. I ask that you please do not distribute your own binaries of RES (e.g. with bugfixes, etc). The version numbers in RES are important references for tech support so that we can replicate bugs that users report using the same version they are, and when you distribute your own - you run the risk of polluting/confusing that. In addition, if a user overwrites his/her extension with your distributed copy, it may not properly retain their RES settings/data depending on the developer ID used, etc.

I can't stop you from doing any of this. I'm just asking out of courtesy because I already spend a great deal of time providing tech support and chasing down bugs, and it's much harder when people think I'm the support guy for a separate branch of code.


Steve Sobel

Contributor guidelines

Thinking about contributing to RES? Awesome! We just ask that you follow a few simple guidelines:

  1. RES has grown quite large, so we do have to pick and choose what features we should add. Code bloat is always a concern, and RES is already rather hefty. If you're unsure if your feature would appeal to a wide audience, please post about it on /r/Enhancement or contact @honestbleeps directly to ask.

  2. There are a few features we have made a conscious choice not to add to RES, so make sure whatever you'd like to contribute isn't on that list.

  3. It would be greatly appreciated if you could stick to a few style guidelines:

    • please use tabs for indentation
    • please use spaces in your if statements, e.g. if (foo === bar), not if(foo===bar)
    • please use single quotes ' and not double quotes " for strings
    • please comment your code!
    • please consider using npm run lint (see below) to verify your code style
  4. If you're adding new modules or hosts, see below.

Project structure

Top level files and folders
  • .github/: Github templates
  • build/: Files handling automated browser deployments
  • changelog/: Release changelogs
  • chrome/: Chrome-specific RES files
  • dist/: build output
  • edge/: Microsoft Edge-specific RES files
  • examples/: example code for new hosts/modules
  • firefox/: Firefox-specific RES files
  • images/: Images for RES logo and CSS icons
  • lib/: all RES code
  • lib/core/: core RES code
  • lib/css/: RES css
  • lib/environment/: RES environment code
  • lib/images/: RES images
  • lib/modules/: RES modules
  • lib/templates/: RES templates
  • lib/utils/: RES utilities
  • lib/vendor/: RES vendor libraries
  • node/: Node files
  • safari/: Safari-specific RES files
  • utils/: Misc RES utilities
  • self-explanatory
  • YOU ARE HERE, unless you're browsing on GitHub
  • gulpfile.babel.js: post-build script for zipping folders.
  • package.json: package info, dependencies
  • webpack.config.babel.js: build script
  • **/__tests__: unit tests
Chrome files
  • background.entry.js: the "background page" for RES, necessary for Chrome extensions
  • environment.js: specific environment settings for Chrome
  • manifest.json: the project manifest
  • options.html: options page for chrome extensions
Microsoft Edge files
  • edge.entry.js: shim to allow chrome extension code usage
  • environment.js: Edge-specific overrides of the Chrome environment
  • manifest.json: the project manifest
Firefox files
  • background.entry.js: the "background page" for RES, necessary for Firefox extensions
  • environment.js: specific environment settings for Firefox
  • package.json: the project manifest for the Firefox add-on
Safari files
  • Info.plist: the project manifest
  • background-safari.html: the "background html page" for RES, necessary for Safari extensions
  • background.entry.js: the "background page" for RES, necessary for Safari extensions
  • environment.js: specific environment settings for Safari

Building development versions of the extension

First time installation:

  1. Install git.
  2. Install node.js (version >= 6).
  3. Install Python 2 (not version 3). On Windows, please install the "Add python.exe to path" feature on the customize screen.
  4. Navigate to your RES folder.
  5. Run npm install.

Once done, you can build the extension by running npm start. This will also start a watch task that will rebuild RES when you make changes (see Advanced Usage for more details).

To load the extension into your browser, see the sections below.

Details and advanced usage

npm start [-- <browsers>] will clean dist/, then build RES (dev mode), and start a watch task that will rebuild RES when you make changes. Only changed files will be rebuilt.

npm run once [-- <browsers>] will clean dist/, then build RES (dev mode) a single time.

npm run build [-- <browsers>] will clean dist/, then build RES (release mode). Each build output will be compressed to a .zip file in dist/zip/.

<browsers> is a comma-separated list of browsers to target, e.g. chrome,firefox,safari,node. all will build all targets. By default, chrome will be targeted.

npm run lint will verify the code style (and point out any errors) of all .js files in lib/ (except lib/vendor/) using ESLint, as well as all .scss files with sass-lint.

npm run lint-fix will autofix any fixable lint issues.

npm test will run unit tests (in __tests__ directories).

Building in Chrome
  1. Go to Menu->Tools->Extensions and tick the Developer Mode checkbox
  2. Choose Load unpacked extension and point it to the dist/chrome folder. Make sure you only have one RES version running at a time.
  3. Any time you make changes to the script, you must go back to the Menu->Tools->Extensions page and Reload the extension.
Building in Microsoft Edge
  1. Go to about:flags and tick the Enable extension developer features checkbox.
  2. Choose Load extension on the extensions menu and select your extensions folder.
  3. Any time you make changes to the extension, you must go back to the Menu->Extensions page, go to the extensions settings and Reload the extension.
Building in Firefox
  1. Install jpm using npm: npm install -g jpm
  2. Navigate to dist/firefox and run the command jpm run, which should launch a new Firefox browser using a temporary profile with only RES installed.
Building in Safari (assumes Mac)
  1. Open the Preferences by going to Safari->Preferences or pressing ⌘,, then go to Advanced and check the checkbox for Show Develop menu in menu bar.
  2. Navigate to Develop->Show Extension Builder to open the extensions builder. Add a new extension by pressing the + in the bottom left and choosing Add Extension.
  3. Navigate to the dist/RES.safariextension folder for RES and select it.
  4. If you are using Safari 9+, you should be able to install the extension without enrolling in the Apple Developer Program; however, the extension will be auto-uninstalled when you quit Safari.

    If you use an older version of Safari or find the auto-uninstall annoying, you need to purchase a proper certificate by signing up for the Apple Developer Program (currently $99/yr).

Accessing nightly builds

In addition to building your own version of RES, you can download older (or current) builds of RES for testing purposes.

(Almost) every commit to master is quickly archived away at; if you would like access to this database, please contact /u/allthefoxes on reddit or email

All that is asked is that you have at least one previous contribution to RES.

Adding new files


See examples/module.js for an example.

Create a new .js file in lib/modules. It will automatically be loaded when the build script is restarted.

Inline image viewer hosts

Please be sure that they support CORS so the sites do not need to be added as additional permissions, which has caused headaches in the past.

See examples/host.js for an example.

Create a new .js file in lib/modules/hosts. It will automatically be loaded when the build script is restarted.


Create a new Sass partial under lib/css/modules/ (with a leading underscore, e.g. _myPartial.scss). Import the file in lib/css/res.scss (i.e. @import 'modules/myPartial';—do not include the underscore or file extension).

Body classes will be automatically added for boolean and enum options with the property bodyClass: true, in the form .res-moduleId-optionKey for boolean options (only when they're enabled), and .res-moduleId-optionKey-optionValue for enums. This is the preferred way to create optional CSS; do not use addCSS() unless absolutely necessary (i.e. variable color, size, etc.).