[csswg-drafts] Pull Request: [css-contain-2] `contentvisibilityautostatechange` event should bubble #11310

knowler has just submitted a new pull request for https://github.com/w3c/csswg-drafts:

== [css-contain-2] `contentvisibilityautostatechange` event should bubble #11310  ==
Resolves #11310 

I believe this was missed as Blink (the first implementer, who I also believe designed the feature?) has the event bubble, while Gecko and WebKit who implemented afterwards, do not bubble per the existing spec. The default for `EventInit` is to not bubble, so that’s part of why I think it was originally missed.

There’s been no discussion and therefore no consensus on this… this is just an interop issue that I’ve known of for over a year now that I’d like to stop caveating [everywhere I write about it](https://12daysofweb.dev/2024/css-content-visibility/#:~:text=a%20discrepancy) or use the feature (since a workaround potentially is necessary). Also, not sure if this is how or where this change needs to happen — I’m happy to be directed elsewhere!

See https://github.com/w3c/csswg-drafts/pull/13854


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Received on Tuesday, 28 April 2026 20:23:20 UTC