Note that templates can be used from within gadgets or user scripts (see below) as well as regular pages.
Note that templates can be used from within gadgets or user scripts (see below) as well as regular pages.
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== Gadgets and user scripts ==
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== Gadgets, user scripts and CSS ==
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MediaWiki has many extension systems. There is a way to add javascript code or CSS upon page load, and to configure for this to happen independently for each user or site-wide. See [https://www.mediawiki.org/wiki/Extension:Gadgets MediaWiki's documentation].