T32713 added "wikipage.content" passing it #mw-content-text, and fired it on initial load and from live preview (and other code like VisualEditor and other extensions/gadgets should also fire it when they replace/update the content).
A few others we should add for things outside the content:
* `wikipage.categories`
arguments: `.catlinks`
Fired initially and from live preview.
e.g. for things like HotCat to listen to
* `wikipage.langlinks`
arguments: `#p-lang`
Fire initially if `#p-lang` exists/non-empty, and from live preview.
* wikipage.diff
arguments: `#wikiDiff`
Fire initially if page has a diff on it, and from live preview if user
did "show changes".
e.g. for patrolling tools to hook into the diff and the [mark as patrolled] link.
* `wikipage.editform`
arguments: (common parent of `.mw-summary-preview`, `.templatesUsed`, `.hiddencats`)
e.g. for vector.footerCleanup and other things that hook into this.
--------------------------
**Version**: 1.21.x
**Severity**: normal