ResourceLoader/Core modules

This page intends to list, document, explain and give examples for all the libraries, plugins and scripts present in MediaWiki's by default, as found in the latest development version of MediaWiki ("git master"). This may vary from the stable release version of MediaWiki. However, this list is currently incomplete.

The order of the modules should be kept similar to. Within the module documentation, the order of the headings for objects should be by order within the script file or by alphabet (whichever makes sense). If a module has only one object, with the same name as the module, this should be documented, but a separate heading is not necessary.

There is now JSDuck documentation for these modules. It does not include all of the below (e.g. the examples are not the same), but is likely to be more up to date, since it is compiled automatically from comments in the source.

The modules  and   together form the base environment ("startup") and are present always. They should not (and in fact can not) be loaded as modules or dependencies. is what provides the loader client itself. jQuery and the other base utilities provided by  are internal dependencies of the ResourceLoader client.

mediawiki
This is the mediawiki base module. It initialises the  global object (with   as alias). Alias  is available everywhere and should be used.
 * API Documentation

mediaWiki.config
For a complete list of configuration values in, check out Manual:Interface/JavaScript. An instance of the Map class that is global by default for backwards compatibility (in 1.17) and contains the wgVars such as,   etc.
 * API Documentation

mediaWiki.hook
A framework for registering and firing events in JavaScript (as opposed to doing everything on document ready).
 * API Documentation

mediaWiki.html
Helper functions for escaping for and creating strings of HTML.
 * API Documentation

mediaWiki.message

 * API Documentation
 * ''See also Manual:Messages API

If the mediawiki.jqueryMsg module is loaded, the behaviour of this module changes significantly. See above link.

mediaWiki.loader

 * API Documentation


 * Get the names of all registered modules.
 * Get the names of all registered modules.

mw.loader.load
Loads modules and other sources. It can be called with one or more modules by name. It can also load an external script or style URI beginning with either "http://", "https://" or "//" and a mime-type in the second argument (either "text/css" or "text/javascript"). If no mime-type is provided, "text/javascript" is assumed. mw.loader.load creates an asynchronous request, so if you need to run code that depends on a module, use mw.loader.using instead. If you want to load another script use.

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mw.loader.using
Loads modules and then executes a callback function. can be called with two or three arguments (dependencies, callback function to execute when modules are successfully loaded, callback function to execute on error).

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mediaWiki.log
This is is automatically loaded (only) in debug-mode (can be enabled with debug=true in the URL) and is an alternative to calling console.log which would cause errors in browsers that don't have a console or don't have it enabled.
 * API Documentation

Calling this either pushes the messages to console if its available and have a logging facility, or adds it to an #mw-log-console if not (the element is created on the first call)

Note that different browsers and extensions may enable or disable different consoles and different logging facilities, and that they may or may not be visible even if they are used for logging purposes.

mediaWiki.Map
A reusable class to store, get and set a set of variables. The core uses this for  and

When making an instance the function takes one parameter which affects whether the set will be made globally available (ie. as items of ) or local. By default this is false (not global) and will thus not not overwrite any global variables with the same name.


 * : An object containing all the variables. If 'global' was true during initialization, this is an alias to the  object.
 * : Function returns true if an entry with the key(s) exists, false otherwise
 * : Returns the value of the key(s) or (optionally) the value of the second argument if the key does not exist (returns null if it doesn't exist and no fallback was provided)
 * : Creates / Modifies one or multiple values

mediaWiki.user

 * API Documentation

Module that represents information about the current user.

mw.user.options
Contains the preferences of the user, or the defaults when logged out.

mw.user.tokens
Is pre-populated with api tokens. Currently editToken, watchToken, and patrolToken.

See a live example from the mediawiki.api.watch module.

mediawiki.api

 * API Documentation

This module provides the mw.Api constructor. The main methods of the mw.Api object are,  , and. The  module (and its plugins) return a Promise – similar to   (and its derivatives such as ,   and  ).

See the API documentation for the various plugins (implemented as modules depending on this one) that make it more convenient to use certain API actions actions by abstracting their input and output.

This module depends on mediawiki.api, and extends the mw.Api prototype with methods related to categorization:

mw.Api#isCategory
Determines if a category exists.

mw.Api#getCategoriesByPrefix
Lists categories with a given prefix.

mw.Api#getCategories
Gets the list of categories that a given page belongs to.

This module depends on mediawiki.api, and extends the mw.Api prototype with methods for editing:

mw.Api#postWithToken
This posts to the API as specified by the parameters. The first parameter is the token to use. It will used a cached value of the specified token if one exists, or get one then post. See doc.wikimedia for more details.

mw.Api#postWithEditToken
This posts to the edit WebAPI as specified by the parameters. It is intended for methods that require an edit token. It will used a cached edit token if one exists, or get one then post.

Warning: You have to specify the  parameter yourself.

mw.Api#getToken
This is a low-level method used by api.postWithEditToken to get the named tokens. It will use a cached version if available.

mw.Api#getEditToken
This is a low-level method used by api.postWithEditToken to get tokens.

mw.Api#newSection
Creates a new section on the given page, with the given section name and text.

mediawiki.api.parse
This module depends on mediawiki.api, and extends the mw.Api prototype with a method for parsing wikitext:

mw.Api#parse
Calls the server to parse the given wikitext. Example:

mediawiki.api.watch
This module depends on mediawiki.api, and extends the mw.Api prototype with methods related to the watchlist:

mw.Api#watch
Watches a given title or titles.

mw.Api#unwatch
Unwatches a given title or titles.

mw.Debug.init
Initializes the debugging pane.

mw.Debug.switchPane
Switches between debug panes.

mw.Debug.buildHtml
Builds HTML for the toolbar.

mw.Debug.buildConsoleTable
Builds the console pane.

mw.Debug.buildQueryTable
Builds the SQL pane.

mw.Debug.buildDebugLogTable
Builds logging pane (legacy).

mw.Debug.buildRequestPane
Builds requests pane.

mw.Debug.buildIncludesPane
Builds included files pane.

mediawiki.debug.init
Calls mw.Debug.init.

mediawiki.feedback
User interface for collecting feedback, particularly on new features, using jQuery UI. This sets the mediaWiki.Feedback constructor. Example:

mw.Feedback.setup
Sets up feedback GUI.

mw.Feedback.display
Displays a particular part of the feedback interface.

mw.Feedback.displaySubmitting
Shows that the feedback is being added.

mw.Feedback.displayBugs
Shows information about bug tracker

mw.Feedback.displayThanks
Shows thank you message.

mw.Feedback.displayForm
Displays the feedback form, with optional pre-filled contents.

mw.Feedback.displayError
Shows given error message.

mw.Feedback.cancel
Dismisses feedback form.

mw.Feedback.submit
Submits feedback form using mw.Api.newSection.

mw.Feedback.launch
Main entry point for displaying the feedback form, with optional pre-filled contents.

mediawiki.jqueryMsg

 * ''See also Manual:Messages API
 * ''See also Manual:Messages API

This module sets the mediawiki.jqueryMsg object. This is used for advanced message parsing. Use it only when mediaWiki.msg and mediaWiki.message do not meet your needs. For example, mediawiki.jqueryMsg is required for plural and gender support, the int: magic word and links.

mediawiki.ui
UI module developed as part of the Agora project. It defines  CSS styles. It is used in the Login and Create account forms and several extensions. It provides one appearance for Vector and another for the rest of the skins. These are some commonly used features:

Buttons
See section 2 of the living style guide for comprehensive code examples with their effects.

Note: in release 1.23 the button styles are in a separate  module. If all you need is button styling, PHP code should only. The button module may be loaded on pages on a wiki but you should still load it as a dependency.

All buttons use the  class. The main button for a particular interface should generally also use an additional class, which varies by type. For example, "save all changes" is constructive, since it completes a process and changes state:

It can also be used on other elements:

Conversely,  is for buttons that make destructive changes to state (such as deletion). You may also sometimes use the  class, which sets the CSS display property to block and width to 100%. The  class increases the font size of buttons.

In release 1.23  is deprecated. Instead use  for final actions and   for actions which lead to a next step in a process.

Inputs
If a form has the  class, it lays out its child divs in a compact vertical stack, and input elements will automatically take on certain styles. For example, text inputs will take on a blue border hue. Checkbox labels should use the  class, and surround the actual checkbox.

If you use HTMLForm to create a form and, it will apply this styling.

addCSS
Adds a  element to the HEAD and returns the CSSStyleSheet object.

The CSSStyleSheet object can be used to disable the css rules at any later time and re-enable them as well. This can be done through the 'disabled' attribute. When setting this to true, the rules no longer apply. When setting to false, the rules apply again.

See also W3 on CSSStyleSheet for more info.

addPortletLink
This function is ported from the legacy wikibits keeping it fully backwards compatible, with a few adjustments that support all core skins and with added support for a CSS-selector as.

Only the first three arguments are required.

In case you need to execute a custom function when the user clicks on a portlet, do not use ' ' for the href of the portlet. Instead, use the jQuery(...).click to specify the code which should be executed.

$content
A jQuery object for a page's overall content area regardless of the skin used. This is, for example,  in the Vector-skin (before 1.20 it was  ). This variable is initialized from the  module. Make sure to either add it to your dependencies or wrap it inline in

This does not refer to the area where the page content goes. If you wish to work with that area of the page instead of the overall content area you should use  instead.

Here is a more advanced example involving loading in extra content with an AJAX request. Run this example on a page other than the main page.

getParamValue
This function returns the value of the specified URL parameter. By default it uses the current window's address. Optionally you can pass it a custom location.

It returns  if the parameter is not present. Returns an empty string if it was an empty parameter (such as

jsMessage
This function is ported from the legacy wikibits keeping it fully backwards compatible, with a few adjustments and with added support to hide the message by calling with no arguments or when passing null.

rawurlencode
This function returns an encoded string in its raw form for use in urls.

For building query strings, you may want to use jQuery.param instead:

validateEmail
Returns true if its string parameter is a valid e-mail address according to HTML5 specification, false if not, and null if passed an empty string.

wikiUrlencode
This function returns a "pretty" version of a URL encoded wiki page name. It keeps slashes and colons unencoded. The behavior differs from  on the PHP side.

wikiGetlink
Use  instead. This function returns the address to a local wiki page.

wikiScript
This function returns the location of a script on the current wiki. Much like  in GlobalFunctions.php.

Parameters:  - Name of the script (eg. 'api'), defaults to 'index'.

mediawiki.cookie
Cookie module that follows most of MediaWiki's cookie settings (except wgCookieSecure). Simple examples:
 * API Documentation

See the JSDuck API documentation for available options.

mediawiki.Title
This sets the mediaWiki.Title constructor, which has several methods in its prototype. Basic example

mediawiki.Uri
Basic examples

mediawiki.notify
Basic examples

jquery
More information about jQuery's presence in MediaWiki, see jQuery. For more about jQuery in general and all its core functions, refer to http://api.jquery.com/

ResourceLoader provides jQuery as part of its base environment (the loader client uses jQuery internally), therefore this module is always loaded and should not (and in fact can not) be loaded through ResourceLoader (as dependency or otherwise).

jquery.async

 * Plugin documentation
 * Plugin documentation

jquery.badge

 * API Documentation

This is a jQuery module that allows you to put a red "badge" on an item on the page. 'Badge' in this case should be considered a verb rather than a noun, as the function returns the parent, not the badge itself.

jQuery#checkboxShiftClick
This single-function plugin can be called to add this functionality to any number of checkboxes. By default (onload) it's applied to all  elements that have a type of checkbox, excluding any with a class of 'noshiftselect'. As it has a built-in prevention to avoid binding the CheckboxShiftClick twice to the same element you can simply run the line below under "Default" again at any time if you want to enable dynamically added checkboxes in the page to be shift-selectable as well. Or alternatively run it on the specific selector of choice (see second example below).

jquery.chosen
“Chosen is a jQuery plugin that makes long, unwieldy select boxes much more user-friendly.” — harvesthq.github.io

In fact, it turns a select into a combo box with autocomplete functionality by default but also supports grouping, and "tagging" (i.e. multiple values).

jquery.client
A plugin that extracts information about the client's browser, layout engine and operating system. Use this instead of jQuery.browser, which is deprecated and will be removed from jQuery in the near future.

jQuery.client.profile
The profile function is the main function here and returns (and caches) all the information in an object in. All possible values (except for version numbers) are predefined. A typical return looks like this:

Here a few examples Check for possible values of browser names, layout engines and platforms.

jQuery.client.test
...

jquery.collapsibleTabs
Used by the Vector extension.

jquery.colorUtil



 * getRGB
 * colors
 * rgbToHsl
 * hslToRgb
 * getColorBrightness

jquery.cookie
You can use jquery.cookie or you can use  instead in new code, since it takes into account MediaWiki's cookie configuration settings for you.

This plugin allows you to set, get and delete cookies.

When deleting a cookie, you must use the same path and domain used when the cookie was set.

Note that when MediaWiki server-side code sets a cookie it usually prefixes it with the database name; this prefix is available to JavaScript code as the mediaWiki.config variable.

Note that users will likely get separate cookies for  and   paths in page URLs if you do not specify the extra option   when setting a cookie.

jquery.json
Provides JSON encoding to old browsers which do not support JSON.stringify:

jquery.jStorage
Project home page

jquery.localize


Localizes a DOM selection by replacing  elements with localized text and adding localized   and   attributes to elements with   and   attributes respectively.

jquery.makeCollapsible



 * See also Manual:Collapsible elements.

Makes elements collapsible. It supports lots of variations such as:
 * Simple: Add " " to an element (a for example) with some content and save the page. The inner content of this element will be treated as collapsible content. Prepended to the element, before the collapsible content, is a toggle-link with a localized label (collapsible-expand, collapsible-collapse)
 * Initial state: Adding " " as additional class will cause the element to be initially collapsed when the page is loaded.
 * Custom label:HTML5 only Using the  and   attributes one can define a custom text for the toggle labels added by the script. When added in wikitext these could populated by a localized message like:


 * Remote toggle: If you don't want the script to put the default toggle link (whether or not with a custom label) in your element, you can make one of your own. This could reside anywhere inside or outside the collapsible element. It's relationship to the collapsible element is detected by using an ID attribute with the prefix  and a corresponding class attribute with prefix   for the collapsible element and the togglelink respectively.

Example: Simple collapsible div or table

Input:

Output:

This is text is collapsible.

Example: Hide the collapsible element by default, the toggle element resides outside of it

For other live examples, see Test Wikipedia - Collapsing Testpage.

jquery.placeholder
This plugin adds support for placeholder texts in input fields for browsers that don't support the HTML5 attribute yet. If the attribute is not supported it's applied to all input elements with a 'placeholder' attribute, on-load.

It has a built-in check for browser support, but for efficiency it's best to do this check (also) wrapped around to call.

jquery.qunit
Testing framework. See http://qunitjs.com.

CompletenessTest
Assesses the completeness (coverage) of test suites for object oriented javascript libraries. Written to be used in environments with jQuery and QUnit.

This is also when running the QUnit test suite with the   option enabled.

jquery.suggestions
There is also jquery.ui.autocomplete.js with similar functionality.

Real world examples: ,

Example shows suggestions for the summary-line:

jquery.tipsy
Example page; JQuery project page

jquery.mwExtension


There are several methods added to the jQuery object for older browsers serving as backwards-compatibility for new native prototypes in newer browser. Also several other convenience functions have been created such as isEmpty and escapeRE. In MediaWiki 1.17 and 1.18 these methods were part of the "jquery.mwPrototypes" module. In MediaWiki 1.19 this module was renamed to "jquery.mwExtension" (see 94227).

jQuery.trimLeft
Trims whitespace from the left side of the string

jQuery.trimRight
Trims whitespace from the right of the string

jQuery.ucFirst
Returns the string with the first character capitalized

jQuery.escapeRE
Returns a string for literal use in a regular expressions by escaping characters that have a special meaning in a regex.

jQuery.isDomElement
Check whether a passed a variable is a direct link to an element.

jQuery.isEmpty
This function checks if a variable is empty. Supports strings, booleans, arrays and objects. The string "0" is considered empty. A string containing only whitespace (ie. " ") is considered not empty.

jQuery.compareArray
Compares two arrays and returns a boolean for whether they are in fact the same

jQuery.compareObject
Compares two objects for it's properties and values (recursive).

jQuery UI
For more information on and demos for jQuery UI, refer to http://jqueryui.com/

The following components are available as individual ResourceLoader modules:
 * jquery.ui.accordion.js
 * jquery.ui.autocomplete.js
 * jquery.ui.button.js
 * jquery.ui.core.js
 * jquery.ui.datepicker.js
 * jquery.ui.dialog.js
 * jquery.ui.draggable.js
 * jquery.ui.droppable.js
 * jquery.ui.mouse.js
 * jquery.ui.position.js
 * jquery.ui.progressbar.js
 * jquery.ui.resizable.js
 * jquery.ui.selectable.js
 * jquery.ui.slider.js
 * jquery.ui.sortable.js
 * jquery.ui.tabs.js
 * jquery.ui.widget.js