Re: [csswg-drafts] [css-anchor-position-1] Back-compat of scrollable containing block for all abspos with implicit anchors (#13067)

Another potential solution to this problem is to use the "scrollable containing-block" if there is a **non-implicit** default anchor. E.g.

This doesn't really matter for popover as it is `position:fixed` by default, and doesn't use the scrollable containing-block.

And would satisfy the forwards compat constraint in adding implicit anchors to different things, etc (and I suspect most of those things would be `position:fixed` for example.

Additionally the "local containing-block" is likely fine for `::before`/`::after` as they are typically fixed-size and are typically used for decoration elements.

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Received on Thursday, 6 November 2025 17:54:41 UTC