Wikia has disabled User Scripts from running on MediaWiki and User namespace pages that end with a '.JS' file extension. This severely reduces the effectiveness of this script. It still works on CSS pages, as well as JS pages that are not MediaWiki:Common.js or User:Name/wikia.js and so on but that's it.
By default, pressing the tab key changes focus from the textarea. This scripts makes the tab key produce a tab character instead, which might be necessary for some coders who prefer indenting by tabs.
The script runs only on pages ending with .js or .css.
Note: In this example, pay close attention to the placement of commas and other punctuation. For people who aren't familiar with programming (and even those who are!), a common mistake when writing code is to accidentally delete, forget, or misplace critical symbols like commas or quotation marks. This can cause a syntax error that breaks the code. Carefully follow the convention shown here when using importArticles.