JavaScript

Languages:

MediaWiki and JavaScript
Delivery JavaScript
ResourceLoader : delivery system for optimized loading and managing of modules Core modules, including jQuery and OOjs API client code
Adding JS on-wiki
Interface (user-specific, group-specific and site-wide) ContentHandler facility for supporting js as page content Snippets Extensions that allow you to add js Extension:Gadgets, Extension:Widgets
Extensions, skins and other modules
ResourceLoader modules Developing with ResourceLoader $wgResourceModules , BeforePageDisplay hook Vue.js Codex: UI design system OOUI Ajax and Ajax extensions TypeScript
Further guidance
Category for all things JavaScript Learning JavaScript CORS Broken scripts Core development: coding conventions and unit testing Technical docs on doc.wikimedia.org
v · d · e

See also Manual:Interface/JavaScript for use of JavaScript overrides on a local wiki install.

As of MediaWiki 1.17 most JavaScript code in MediaWiki is object-oriented and packaged as ResourceLoader modules that other code can depend on. Also, jQuery was introduced in MediaWiki core in MediaWiki 1.16, and loaded by default on every page as of 1.17.

Before MediaWiki 1.16, most JavaScript was in wikibits.js and other files in /skins/common/.

Manual:JavaScript unit testing
Compatibility — This page documents which browsers get JavaScript served.
ResourceLoader
ResourceLoader/Modules — all modules part of MediaWiki core
jQuery
JavaScript code conventions
JavaScript performance
Gadget kitchen — how you can write gadgets in JavaScript to modify and extend MediaWiki behavior
Snippets — collections of random code snippets
No-JavaScript notes
The English Wikipedia's article on JavaScript

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