RESOLVED FIXED306830
[css-anchor-position-1] Interpret position-try-order logical axis using the containing block's writing mode 
https://bugs.webkit.org/show_bug.cgi?id=306830
Summary [css-anchor-position-1] Interpret position-try-order logical axis using the c...
fantasai
Reported 2026-02-02 20:25:29 PST
Currently we use the box's own writing mode to resolve position-try-order values, but the spec was updated to use the containing block writing mode. See https://github.com/w3c/csswg-drafts/issues/12869#issuecomment-3406959070 and https://wpt.live/css/css-anchor-position/position-try-order-logical.html The relevant code lives in TreeResolver::sortPositionOptionsIfNeeded() ; should be an easy fix.
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Radar WebKit Bug Importer
Comment 1 2026-02-02 20:34:26 PST
<rdar://problem/169501069>
Kiet Ho
Comment 2 2026-03-27 23:33:06 PDT
Note that there are actually two parts to this: position-try-options and position-try-fallbacks both got switched to use the containing block's writing mode.
Kiet Ho
Comment 3 2026-03-28 00:07:37 PDT
[css-anchor-position-1] position-try-fallbacks tactic keywords should be resolved against the containing block's writing mode https://bugs.webkit.org/show_bug.cgi?id=310959
Kiet Ho
Comment 4 2026-03-28 00:35:17 PDT
Pull request: https://github.com/WebKit/WebKit/pull/61558
EWS
Comment 5 2026-03-30 19:42:34 PDT
Committed 310277@main (121963fe3074): <https://commits.webkit.org/310277@main> Reviewed commits have been landed. Closing PR #61558 and removing active labels.
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