Re: [csswg-drafts] [css-position-4][css-anchor-position] Top layer exit animations require tracking a lot of state for implicit anchors (#13595)

> Is this PR missing anything? From what I can tell it fully addresses this. [whatwg/html#11695](https://github.com/whatwg/html/pull/11695)

It doesn't. WebKit also needs to track whether an element is an implicit anchor (not just what implicit anchor element a popover has). See: https://searchfox.org/wubkat/rev/3c61ff323d75b60ba91bbae6ed6b7ec7c1537848/Source/WebCore/style/AnchorPositionEvaluator.cpp#1671-1676

This gets trickier when you add top layer exit animations in the mix, because that is now an extra bit to handle.

The PR covers how to track which implicit anchor element a popover has, but not the information bit of whether a button is an implicit anchor or not.

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Received on Wednesday, 15 April 2026 05:10:08 UTC