NOTE: See announcement at https://lists.wikimedia.org/pipermail/wikitech-ambassadors/2017-April/001574.html
WARNING: All JavaScript functionality is broken since 2017-04-27 for users who use old [[https://www.mediawiki.org/wiki/Manual:Interface/JavaScript#Personal_scripts|scripts]]. Some [[https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(technical)&oldid=777814155#Guide:_How_to_find_which_scripts_are_actually_broken|advice on what to disable]] is available.
WARNING: gadgets, Common.js etc. which use **mw.util** now must declare it first, see [[https://ja.wikipedia.org/w/index.php?title=MediaWiki:Common.js&diff=63936276&oldid=62869164|example fixes]].
```
* @deprecated since 1.17 Use jquery.client instead
* @deprecated since 1.17 Use jQuery instead
* @deprecated since 1.17 Use jquery.checkboxShiftClick instead
* @deprecated since 1.17 Use mw.toolbar instead
* @deprecated since 1.18 Use jquery.spinner instead
* @deprecated since 1.18 Use mw.html instead
* @deprecated since 1.17 Use mediawiki.notify instead
* @deprecated since 1.17 Use mediawiki.util or jquery.accessKeyLabel instead
* @deprecated since 1.17 Use mw.loader instead. Warnings added in 1.25.
* @deprecated since 1.17 Use mw.loader instead. Warnings added in 1.25.
```
I'm guessing most of them will be onwiki usages, which are more of a PITA to cleanup
⇨ **[mw-js-deprecate usage (logged-in users only, sampled 1:100)](https://grafana.wikimedia.org/dashboard/db/mw-js-deprecate?refresh=1m&orgId=1&from=now-2y&to=now)**
{F7495864 height=300}