JavaScript

JavaScript is very useful to fine tune an HTML page, and possibly making it interactive.

Please note that on MediaWiki platforms certain functionalities are disabled for security reasons, e.g. using <script> tags.

Malicious scripts

On 5 March 2026 from 15:36 a global JavaScript worm corrupted Meta. As a measure all Wikimedia platforms were put on read-only for nearly 2 hours.

Indications

• Common JavaScript altered
• User common and global scripts altered
• Articles vandalized by JavaScript
• Articles deleted for no good reason
• Multiple users rapidly making multiple "random updates"

See also

• Coding conventions
• How to enhance wiki content with JavaScript
• HTML in wikitext
• JavaScript
• JavaScript interface
• jQuery
• Learning library
• User scripts Guide