hidden=until-found attribute and beforematch event

[josepharhar]

WebKittens

No response

Title of the spec

hidden=until-found attribute and beforematch event

URL to the spec

https://html.spec.whatwg.org/multipage/interaction.html#the-hidden-attribute

URL to the spec's repository

https://github.com/whatwg/html

Issue Tracker URL

No response

Explainer URL

https://github.com/WICG/display-locking/blob/main/explainers/hidden-content-explainer.md

TAG Design Review URL

w3ctag/design-reviews#511

Mozilla standards-positions issue URL

mozilla/standards-positions#612

WebKit Bugzilla URL

https://bugs.webkit.org/show_bug.cgi?id=238266

Radar URL

No response

Description

I originally requested feedback for this here: https://lists.webkit.org/pipermail/webkit-dev/2022-March/032142.html

This is closely related to #247

This feature builds on content-visibility:hidden and a portion of content-visibility:auto in order to work.

[annevk]

Colleagues and I discussed this and think it's a good feature. I suggest we mark this as "position: support" one week from now. Thanks for checking in Joey!