Thread:Talk:Requests for comment/Isolate custom jQuery libraries/already loading Spinner, other spinner notes

Nearly all WMF wikis load TimedMediaHandler and on 'BeforePageDisplay' it adds module 'mw.PopUpMediaTransform', which depends on, an earlier version of fgnass's code. TMH uses it to render a fairly large "loading" animation over media players.

It would be nice to only use one spinner library. is to reduce resource code loaded by TMH and MwEmbedSupport. A lot of extensions roll their own spinner, including I think ApiSandbox, Flow, LiquidThreads, UploadWizard...

BTW WMF still has a lot of code using (window.) and   from wikibits.js, even though it's deprecated.