Gadgets and user scripts using the moment library should revise their code to not use the library as it has been deprecated and will begin to log messages in the developer console.
Various alternatives exist including the Intl library and the new mediawiki.DateFormatter library. Please feel free to ask questions on this Phabricator ticket to get advice.
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | None | T340453 [Epic] FY 2023-24 Growth Maintenance Work | |||
| Resolved | BUG REPORT | kostajh | T324454 Special:Notifications shows the date in English and not in Kurdish on ku.wikipedia | ||
| Open | BUG REPORT | None | T391759 Croatian date format in Special:Notifications incorrectly lacks trailing dot | ||
| Open | None | T146798 Replace Moment.js in core with mediawiki.DateFormatter, JavaScript Temporal and Intl | |||
| Resolved | Quiddity | T392532 Encourage maintainers of gadgets and user scripts to migrate away from the now-deprecated Moment library |
Tech News - @Jdlrobson, When should this be included? Please let me know if the wording below is in order. I will also need some links for this entry.
Moment library has been deprecated and will begin to log messages in the developer console. Gadgets and user scripts using the moment library should revise their code to other alternatives like Intl library and the new mediawiki.DateFormatter library.
I've added it to https://meta.wikimedia.org/wiki/Tech/News/2025/19 with this wording; please advise (or edit directly) if changes are needed:
Developers who use the moment library in gadgets and user scripts should revise their code to use alternatives like the Intl library or the new mediawiki.DateFormatter library. The moment library has been deprecated and will begin to log messages in the developer console. You can see a global search for current uses, and ask related questions in phabricator.
I also recommend adding any useful links into the Task Description here, e.g. linking to any documentation about the mediawiki.DateFormatter library.
I’m looking at migrating my Comments in Local Time fork from Moment.js to Intl.RelativeTimeFormat and mediawiki.DateFormatter. Unfortunately, the user script currently relies on some behavior that the new libraries don’t cover: in Moment.js, calendar time can say “Last Monday”, whereas Intl.RelativeTimeFormat would say “5 days ago”. I’ll probably settle for just repeating the day of the week by itself, but this likely won’t be as understandable in some languages other than English. Just noting this in case other gadget or user script developers run into the same problem.