The jquery.cookie ResourceLoader module was merged with the mediawiki.cookie ResourceLoader module in June 2023 (T271995). When we did this we retained an alias to support gadgets referencing the old code. The deprecation has followed the [[ https://www.mediawiki.org/wiki/Stable_interface_policy/Frontend# | Frontend stable policy ]].
The alias will be removed next week via the MediaWiki deployment train (Week Jan 15-19th): T338637.
To avoid disruption, a script was run to migrate impacted code we detected. Here is an example:
If the script missed your code https://meta.wikimedia.org/w/index.php?title=User:He7d3r/Tools.js&diff=prev&oldid=26055575
**We were unable to patch minified JS.**
This is an FYI. For most editors no action is needed, but if you suspect your script is one of the 22 broken by this change you can see this URL for confirmation: https://global-search.toolforge.org/?q=%27jquery%5C.cookie%27®ex=1&namespaces=2%2C8&title=.*%5C.js
If you do encounter issues with scripts that might be related the solution is to replace code referencing the string 'jquery.cookie' with the string 'mediawiki.cookie'
Feel free to ask questions here.