RESOLVED FIXED310874
[threaded-animations] REGRESSION: animating to an implicit value for individual transform properties fails to animate 
https://bugs.webkit.org/show_bug.cgi?id=310874
Summary [threaded-animations] REGRESSION: animating to an implicit value for individu...
Antoine Quint
Reported 2026-03-27 02:32:10 PDT
A simple test such as this one: document.body.appendChild(document.createElement("div")).animate({ offset: 0, "translate": "0px 120px", opacity: 0 }, 1000); … crashes the UI process :( This used to work fine prior to threaded animations.
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Radar WebKit Bug Importer
Comment 1 2026-03-27 02:32:30 PDT
<rdar://problem/173487467>
Antoine Quint
Comment 2 2026-03-27 02:34:42 PDT
Sorry, not a crash, just a behavior failure.
Antoine Quint
Comment 3 2026-03-27 02:42:01 PDT
Pull request: https://github.com/WebKit/WebKit/pull/61481
Antoine Quint
Comment 4 2026-03-27 11:04:45 PDT
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/58819
EWS
Comment 5 2026-03-28 01:26:00 PDT
Committed 310146@main (8f4c548a8aaf): <https://commits.webkit.org/310146@main> Reviewed commits have been landed. Closing PR #61481 and removing active labels.
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