Editing Help/Templates (section)

=== CSS and JavaScript code === <!--T:103-->

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Besides MediaWiki code, many templates make use of CSS and some rely on JavaScript to work fully. If the copied templates are not behaving as expected, this may be the cause. To copy the required CSS and JavaScript to your wiki you'll normally need to have admin privileges, because you'll be editing system messages in the "MediaWiki:" namespace.
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# <translate><!--T:105--> Look for the use of CSS classes (text like <tvar name=1><code>class="foobar"</code></tvar>) in the template text.</translate> <translate><!--T:444--> If those classes appear in <tvar name=1><code>MediaWiki:Common.css</code></tvar> or <tvar name=2><code>MediaWiki:Vector.css</code></tvar> on the original wiki, copy those classes to <tvar name=1><code>MediaWiki:Common.css</code></tvar> on the new wiki and check if the template is now fine.</translate>
# <translate><!--T:106--> If the copied template is still not working as expected, check if there is code in <tvar name=1><code>MediaWiki:Common.js</code></tvar> or <tvar name=2><code>MediaWiki:Vector.js</code></tvar> on the original wiki.</translate> <translate><!--T:445--> If so, you can try copying it to <tvar name=1><code>MediaWiki:Common.js</code></tvar> on the new wiki.</translate> <translate><!--T:446--> Normally, it is a good idea to only copy code from trusted sources, and browse the code to identify and select the relevant parts.</translate> <translate><!--T:447--> You may find comments that can serve as clues to identify the functionality of each part.</translate>

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