Implement onscrollend event handler

[Rumyra]

Acceptance Criteria

• The listed features are documented sufficiently on MDN
• BCD is updated
• Interactive example and data repos are updated if appropriate
• The content has been reviewed as needed

For folks helping with Firefox related documentation

• Set bugs to dev-doc-complete
• Add entry to Firefox release notes if feature is enabled in release
• Add entry to Firefox experimental features page if feature is not yet enabled in release

Features to document

onscrollend

Related Gecko bugs

https://bugzilla.mozilla.org/show_bug.cgi?id=1797013
https://bugzilla.mozilla.org/show_bug.cgi?id=1803435

Other

• Check content open issues to see if any pertain to the subject matter. If there are any that can be closed because of the work, do so. If there are any that can be fixed relatively quickly because of the knowledge from completing this issue and you have time, feel free to go ahead and fix them.
• Check if glossary updates are required for the feature you're documenting - whether an existing term needs to be updated or a new term should be added.
• Check if BCD update means that content pages need to have experimental markup removed or deprecated markup added (front matter tags and macros).

mdn/mdn#252

Related pull requests and issues

• Content docs(API): scrollend event fired when scrolling complete in Document and scrollable elements #22894
• BCD releases(API): Fx 109 enables scrollend event by default which indicates scroll is complete browser-compat-data#18407
• Relnote (Experimental) Experimental Features: FF109 enables 'scrollend' by default #22904

[bsmth]

Resources:

• https://chromestatus.com/feature/5186382643855360
• https://drafts.csswg.org/cssom-view/#scrolling

Related pull requests:

• add scrollend event details whatwg/html#8433

Bugzilla:

• landed in Fx 108 https://bugzilla.mozilla.org/show_bug.cgi?id=1797013

From the spec:

Event	Interface	Interesting targets	Description
scrollend	Event	Document, elements	Fired at the Document or element when scroll is completed: the viewport or element has been scrolled, the scroll sequence has ended and any scroll offset changes have been applied.

[dlrobertson]

FWIW I just landed the change to enable scrollend events by default, see bug 1803435.

[bsmth]

FWIW I just landed the change to enable scrollend events by default, see bug 1803435.

Thanks for the heads up, I've added a comment there to link back to the docs additions.

[bsmth]

This is complete for 108 including nightly & experimental release notes.

For Fx 109 stable release, we need to move out the experimental note into the release notes.

[dlrobertson]

This is complete for 108 including nightly & experimental release notes.

For Fx 109 stable release, we need to move out the experimental note into the release notes.

👍 just read the MDN doc and it looks great! Thanks!

[bsmth]

Closing this one as done now ✅