RESOLVED FIXED310843
lh/rlh units resolve with double-zoom when line-height is a number 
https://bugs.webkit.org/show_bug.cgi?id=310843
Summary lh/rlh units resolve with double-zoom when line-height is a number
Vitor Roriz
Reported 2026-03-26 16:03:33 PDT
When resolving lh/rlh units for evaluation-time zoom properties, the LineHeightEvaluationContext was constructed with computedFontSize(), which already includes zoom. For number line-heights, the percentage evaluation multiplies by this zoomed font size, producing a zoomed result. Evaluation-time zoom then applies zoom again at layout, causing double-zoom.
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Radar WebKit Bug Importer
Comment 1 2026-03-26 16:03:41 PDT
<rdar://problem/173448638>
Vitor Roriz
Comment 2 2026-03-26 16:08:14 PDT
Pull request: https://github.com/WebKit/WebKit/pull/61447
EWS
Comment 3 2026-03-26 19:42:42 PDT
Committed 310043@main (6a30457b6cca): <https://commits.webkit.org/310043@main> Reviewed commits have been landed. Closing PR #61447 and removing active labels.
Vitor Roriz
Comment 4 2026-03-30 11:40:45 PDT
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/58860
EWS
Comment 5 2026-03-31 00:52:33 PDT
Committed 305413.599@safari-7624-branch (ac571b4f7f7a): <https://commits.webkit.org/305413.599@safari-7624-branch> Reviewed commits have been landed. Closing PR #4857 and removing active labels.
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