Extension:UseResource

The UseResource extension adds the and  tags that allow JavaScript and CSS to be loaded from the MediaWiki namespace on a per-page basis.

When used in a template, pages that use the template will load the JS/CSS, this allows for the loading of scripts and stylesheets only used on some pages to be only loaded on the pages they are used on rather than being loaded on all pages using MediaWiki:Common.js and MediaWiki:Common.css or Extension:Gadgets.

Scripts can only be loaded from the MediaWiki namespace to prevent malicious code from being run, if you desire a way for user to edit stylesheets that only affect the content area, see Extension:TemplateStyles.

Usage
The extension is used by including  or    tags on wiki pages to load the resource (script or stylesheet), replacing   with the name of the resource.

Resources must be located in the MediaWiki namespace and can only be edited by uses with the  userright as they are the only users allowed to edit pages in the MediaWiki namespace.

The value of the  attribute is the name of the resource to load. If not namespace is included, the MediaWiki namespace is assumed. For example, if you had a script located at MediaWiki:Test.js, you could load it using. This will fail if the requested script does not exist, is not located in the MediaWiki namespace, or if it does not have the correct content model, JavaScript for scripts and CSS for stylesheets.

If the same resource is included on a single page multiple times, it is only run once.