RESOLVED FIXED291864
[css-anchor-position-1] position-area for scrollable containing blocks should use entire scrollable area, not just the initial scrollport bounds 
https://bugs.webkit.org/show_bug.cgi?id=291864
Summary [css-anchor-position-1] position-area for scrollable containing blocks should...
fantasai
Reported 2025-04-21 15:34:30 PDT
The CSSWG resolved to adopt a "scrollable containing block" for `position-area` in order to give a more reasonable containing block for positioned boxes: https://github.com/w3c/csswg-drafts/issues/10861 We should adopt this concept in our code. It's particularly important in conjunction with the new auto-safety overflow alignment rules: https://www.w3.org/TR/css-align-3/#auto-safety-position
Attachments
Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2025-04-21 15:34:37 PDT
<rdar://problem/149717067>
fantasai
Comment 2 2025-04-21 15:41:25 PDT
Related issue: https://github.com/w3c/csswg-drafts/issues/12106
fantasai
Comment 3 2026-02-09 03:19:48 PST
Pull request: https://github.com/WebKit/WebKit/pull/58190
EWS
Comment 4 2026-02-14 15:49:07 PST
Committed 307593@main (acd646641dc3): <https://commits.webkit.org/307593@main> Reviewed commits have been landed. Closing PR #58190 and removing active labels.
Note You need to log in before you can comment on or make changes to this bug.