Provides library of common widgets, layouts, and windows.

Installs: 763 812

Dependents: 2

Suggesters: 0

Security: 0

Stars: 60

Watchers: 11

Forks: 28


v0.50.4 2024-07-11 21:53 UTC

This package is auto-updated.

Last update: 2024-07-15 12:11:55 UTC


OOUI is a component-based JavaScript UI library. Key features:

  • Common widgets, layouts, and dialogs
  • Classes, elements, and mixins to create custom interfaces
  • Internationalization and localization, like right-to-left (RTL) languages support
  • Theme-ability
  • Built-in icons
  • Accessibility features

It is the standard library for Web products at the Wikimedia Foundation, having been originally created for use by VisualEditor.

Quick start

The library is available on npm. To install:

$ npm install oojs-ui

Once installed, include the following scripts and styles to get started:

<script src="node_modules/jquery/dist/jquery.min.js"></script>
<script src="node_modules/oojs/dist/oojs.min.js"></script>

<script src="node_modules/oojs-ui/dist/oojs-ui.min.js"></script>
<script src="node_modules/oojs-ui/dist/oojs-ui-wikimediaui.min.js"></script>
<link rel="stylesheet" href="node_modules/oojs-ui/dist/oojs-ui-wikimediaui.min.css">

Loading the library

While the distribution directory is chock-full of files, you will normally load only the following three:

  • oojs-ui.js, containing the full library;
  • One of oojs-ui-wikimediaui.css or oojs-ui-apex.css, containing theme-specific styles; and
  • One of oojs-ui-wikimediaui.js or oojs-ui-apex.js, containing theme-specific code

You can load additional icon packs from files named oojs-ui-wikimediaui-icons-*.css or oojs-ui-apex-icons-*.css.

The remaining files make it possible to load only parts of the whole library.

Furthermore, every CSS file has a right-to-left (RTL) version available, to be used on pages using right-to-left languages if your environment doesn't automatically flip them as needed.

Issue tracker

Found a bug or missing feature? Please report it in our issue tracker Phabricator!


We are always delighted when people contribute patches. To setup your development environment:

  1. Clone the repo: $ git clone https://gerrit.wikimedia.org/r/oojs/ui oojs-ui

  2. Move into the library directory:
    $ cd oojs-ui

  3. Install composer and make sure running composer will execute it (e.g. add it to $PATH in POSIX environments).

  4. Install dev dependencies:
    $ npm install

  5. Build the library (you can alternatively use grunt quick-build if you don't need to rebuild the PNGs):
    $ grunt build

  6. You can see a suite of demos in /demos by executing:
    $ npm run-script demos

  7. You can also copy the distribution files from the dist directory into your project.

  8. You can start a local web server by running php -S localhost:80 in your root dir.

  9. You can navigate to http://localhost/tests/ to run the tests locally in your browser.

We use Gerrit for code review, and Phabricator to track issues. To contribute patches or join discussions all you need is a developer account.

  • If you've found a bug, or wish to request a feature raise a ticket on Phabricator.
  • To submit your patch, follow the "getting started" quick-guide. We try to review patches within a week.
  • We automatically lint and style-check changes to JavaScript, PHP, LESS/CSS, Ruby and JSON files. You can test these yourself with npm test and composer test locally before pushing changes. SVG files should be squashed in advance of committing with SVGO using svgo --pretty --disable=removeXMLProcInst --disable=cleanupIDs <filename>.

A new version of the library is released most weeks on Tuesdays.


Get updates, ask questions and join the discussion with maintainers and contributors:

  • Join the Wikimedia Developers mailing list, wikitech-l.
  • Chat with the maintainers on #wikimedia-dev on irc.libera.chat.
  • Ask questions on StackOverflow.
  • Watchlist the documentation on MediaWiki to stay updated.


We use the Semantic Versioning guidelines.

Releases will be numbered in the following format:




Prepare and submit the release commit

From the root of this repository, update master and check out a new release branch:

$ git remote update
$ git checkout -B release -t origin/master

Clean-install npm dependencies, update Composer dependencies, and ensure tests pass:

$ npm ci && composer update && npm test && composer test

Generate a list of commits that are part of this release:

$ git log --format='* %s (%aN)' --no-merges v$(node -e 'console.log(require("./package").version);')...HEAD | grep -v "Localisation updates from" | sort

In History.md, add a new heading for this version and date. Copy the list of commits into the new section and sort into five sub-sections, in order, omitting any sub-section that has no commits:

### Breaking changes
### Deprecations
### Features
### Styles
### Code

Generate the list of Phabricator tasks for this release. Copy the resulting list and save it for later. In a later step, you will add it to the commit message of the MediaWiki core commit.

$ git log --pretty=format:%b v$(node -e 'console.log(require("./package").version);')...HEAD | grep Bug: | sort | uniq

Update the version number (in the following command, change 'patch' to 'minor' if you've made breaking changes):

$ npm version patch --git-tag-version=false

Commit the release and submit to Gerrit. Note that if there is a Phabricator task associated with the release, you should edit the commit to add the bug number before running git review.

$ git add -u
$ git commit -m "Tag v$(node -e 'console.log(require("./package").version);')"
$ git review

Publish the tag and push to NPM

After the tag commit is merged in this repo, push the tag and publish to NPM:

$ git remote update
$ git checkout origin/master
$ git tag "v$(node -e 'console.log(require("./package").version);')"
$ npm run publish-build && git push --tags && npm publish

Update the mediawiki/vendor repo

In your local mediawiki/vendor repo, point composer to the new version and pull in the updated vendor files:

# Replace 1.2.34 with the version number of the new release
$ composer require oojs/oojs-ui 1.2.34 --no-update
$ composer update --no-dev

Then commit the changes with the following commit message, replacing 1.2.34 with the new OOUI version number (example: https://gerrit.wikimedia.org/r/c/mediawiki/vendor/+/813629).

$ git add -u
$ git commit

Commit message format:

Update OOUI to v1.2.34

  Release notes: https://gerrit.wikimedia.org/g/oojs/ui/+/v1.2.34/History.md

Push this to gerrit. Take note of the Change-Id in the commit message. Copy it and save it for later. You will need it for the Depends-On: line in the commit message when updating MediaWiki.

$ git review
# Show the last commit
$ git show --stat

Update the MediaWiki core repo

In your local MediaWiki core repo, open composer.json and update the version number of oojs/oojs-ui to the new version number.

Open RELEASE-NOTES-1.NN. If there is already a list item about OOUI, update the latest version number. For example, if there is a list item that says "Updated OOUI from v1.2.0 to v1.2.33", update the latter version number fo v1.2.34. If there isn't a list item about OOUI yet, add one in the Changed external libraries section.

Open resources/lib/foreign-resources.yaml. For the OOUI listing, change the version and the src URL to use the new version number. Compute the new integrity hash:

$ php maintenance/run.php manageForeignResources make-sri ooui
# Or if you're running Docker...
$ docker compose exec mediawiki php maintenance/run.php manageForeignResources make-sri ooui

Then update the OOUI library files:

$ php maintenance/run.php manageForeignResources update ooui
# Or if you're running Docker...
$ docker compose exec mediawiki php maintenance/run.php manageForeignResources update ooui

Then commit the changes with the following commit message, replacing 1.2.34 with the new OOUI version number:

$ git add -u
$ git commit

Commit message format, where the list of bugs is the list you generated during the OOUI tag step, and Depends-On is set to the Change-Id of the mediawiki/vendor commit:

Update OOUI to v1.2.34

  Release notes: https://gerrit.wikimedia.org/g/oojs/ui/+/v1.2.34/History.md

Bug: T123456
Bug: T234567
Depends-On: I12345678901234567890

Then push that commit to gerrit:

git review

Update the VisualEditor/VisualEditor repo

In your local VisualEditor/VisualEditor repo, run the script to create a commit updating the local copy of OOUI, and push the commit to Gerrit:

$ ./bin/update-ooui.sh
$ git review