Wikia

Community Central

Help:Advanced CSS and JS

Redirected from Help:JavaScript and CSS Cheatsheet

109,722pages on
this wiki
Talk0

Creating some custom code for your community, or for your own account? This page has more background details to help you with both.

For a more basic overview, see Help:CSS and JS customization.

CSS and JS cheatsheetEdit

The tables below are summarized guides to most of CSS and JS customization pages. The most common choices are highlighted in green.

CSS
Stylesheet Located at Affected wikias Affected users Affected skins
MediaWiki:Wikia.css/Special:CSS this wikia this wikia all users Wikia (default)
MediaWiki:Common.css this wikia this wikia all users varies
MediaWiki:Monobook.css this wikia this wikia all users Monobook
Special:MyPage/common.css this wikia this wikia you only all
Special:MyPage/wikia.css this wikia this wikia you only Wikia (default)
Special:MyPage/monobook.css this wikia this wikia you only Monobook
w:Special:MyPage/global.css Community Central all wikias you only all
JavaScript
Script file Located at Affected wikias Affected users Affected skins
MediaWiki:Common.js this wikia this wikia all users all
MediaWiki:Wikia.js this wikia this wikia all users Wikia (default)
MediaWiki:Monobook.js this wikia this wikia all users Monobook
Special:MyPage/common.js this wikia this wikia you only all
Special:MyPage/wikia.js this wikia this wikia you only Wikia (default)
Special:MyPage/monobook.js this wikia this wikia you only Monobook
w:Special:MyPage/global.js Community Central all wikias you only all

CSS and JS editor error checkingEdit

Wikia's CSS and JS editors have active error checking ("linting") and syntax highlighting:

  • As you type code, the page will let you know about any errors in the syntax that might have occurred
  • Do note that not every issue has to be be solved - CSS (and even JS) technology is ever evolving, and browsers do not all behave identically: some messages may not require action.

Common issuesEdit

CSS issues
Issue Explanation
@import prevent parallel downloads, use <link> instead Link tags are normally used to import CSS. However, MediaWiki does not support adding your own link tags without use of JS, so this error can normally be ignored.
Expected X but found Y This means you have entered an invalid value for a property. For example, in 'color: foo;' foo is an invalid value for the color property because it is not a color.
Use of !important !important should generally be avoided in CSS as it can makes it harder to maintain, and also makes it harder for users to override settings in their personal CSS. Most of the time, using the correct selector will help you avoid using !important.
Unknown property 'codename' Although not all CSS code is recognized by the tool (as CSS itself is a frequently updated artform), certain CSS codes can still be read when they are implemented for a certain object on the Wikia page (For example, mix-blend-mode: color-dodge;).

Advanced notesEdit

Load orders
The general load order on Wikia is: core code, then local community code, then personal code.
Within each level, the load order is: 'common' code, then skin-specific code.
!important in CSS
Due to CSS load orders, you may sometimes need to make use of the !important property to ensure a CSS rule is applied.
Caching issues
Every file you download from the Internet gets cached. Normally that's great because it reduces traffic both for your own device and for Wikia's servers, but it can be a problem when it comes to testing design changes. It may take a while before your changes to take effect unless you use the following tricks:
Note: After saving, you may have to bypass your browser's cache to see the changes.
  • Chrome - Windows: Hold the Ctrl key and press the F5 key. OS X: Hold both the ⌘ Cmd and ⇧ Shift keys and press the R key.
  • Safari - Hold down the ⇧ Shift key and click the Reload toolbar button.
  • Firefox - Windows: Hold the Ctrl key, and press F5. OS X: Hold the ⌘ Cmd and ⇧ Shift keys, and then press R.
  • Internet Explorer - Hold the Ctrl key, and press F5 (or click the Refresh button).
You may need to manually refresh each page you recently opened to see the change there.
Popular JavaScript snippets
To get an idea of some scripts others have written that you might find useful or would like to try, take a look at the list of JS Enhancements on the Developers Wiki.
Duplicate JavaScript
Many scripts can have problems if they run multiple times on the same page. Make sure write the code such that a particular piece of code runs only once. Avoid pasting the same code in multiple files as it will likely conflict and cause confusing errors for you and other visitors.

Further readingEdit

Further help and feedbackEdit

Around Wikia's network

Random Wiki