Re: [csswg-drafts] [css-anchor-position] Absolutely positioned element does not find fixed anchor (#10419)

I'm running into a _similar_ issue with regards to "absolutely positioned" content.

See [this](https://codepen.io/Westbrook/pen/wvLBwLP) broken example wherein:
- the parent element is `position: fixed;`
- the anchor element is `position: fixed;`, and
- the content element is `position: fixed;` AND on the `#top-layer`
Leading to the content not being positioned relative to the anchor:
![within fixed positioned ancestor](https://github.com/w3c/csswg-drafts/assets/1156657/506d0145-ac93-484b-a898-8440f22748cd)

You can work around this by positioning the parent differently, as seen [here](https://codepen.io/Westbrook/pen/QWXwWWx):
- the parent element fills the screen with `width` and `height`
- the anchor element is `position: fixed;`, and
- the content element is `position: fixed;` AND on the `#top-layer`
Leading to the content being positioned as expected:
![within sized ancestor](https://github.com/w3c/csswg-drafts/assets/1156657/1b04eb3d-4b5b-4949-8909-bcce293ca41b)

Do we see this as "outside of the spec", something yet to be covered, an implementation issue? I've opened a [Chromium bug](https://issues.chromium.org/issues/352005194) in case it is the later...

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Received on Wednesday, 10 July 2024 15:48:59 UTC