321939 2026-08-17 09:07:59 -0700 [EvaluationTimeZoom] px values in calc() expressions that survive through computed style are being serialized incorrectly 2026-08-17 16:50:13 -0700 1 1 1 Unclassified WebKit CSS Safari 18 Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 sam sam koivisto webkit-bug-importer oldest_to_newest 2240977 0 481080 sam 2026-08-17 09:07:59 -0700 Created attachment 481080 Test case px values in calc() expressions that survive through computed style are being unzoomed incorrectly. This used to be necessary, when computed values were zoomed, but with evaluation time zoom this is incorrect. For example, given ``` <div id=foo style="zoom: 2; text-indent: calc(10% + 10px);"></div> ``` the following script: ``` window.getComputedStyle(document.getElementById("foo")).textIndent; ``` should print `calc(10% + 10px)` but instead prints `calc(10% + 5px)` (the px term is being incorrectly unscaled by the zoom). 2240984 1 sam 2026-08-17 09:22:37 -0700 Pull request: https://github.com/WebKit/WebKit/pull/71779 2241185 2 ews-feeder 2026-08-17 16:49:04 -0700 Committed 319320@main (17e6d00a1924): <https://commits.webkit.org/319320@main> Reviewed commits have been landed. Closing PR #71779 and removing active labels. 2241187 3 webkit-bug-importer 2026-08-17 16:50:13 -0700 <rdar://problem/185156231> 481080 2026-08-17 09:07:59 -0700 2026-08-17 09:07:59 -0700 Test case calc-zoom.html text/html 471 sam PCFET0NUWVBFIGh0bWw+CjxtZXRhIGNoYXJzZXQ9IlVURi04Ij4KPHN0eWxlIGlkPXN0eWxlIHR5 cGU9InRleHQvY3NzIj4KICAjZm9vIHsgem9vbTogMjsgdGV4dC1pbmRlbnQ6IGNhbGMoMTAlICsg MTBweCk7IH0KPC9zdHlsZT4KPHByZSBpZD1jb25zb2xlPjwvcHJlPgo8ZGl2IGlkPWZvbz48L2Rp dj4KCjxzY3JpcHQ+CiAgY29uc3QgY29uc29sZSA9IGRvY3VtZW50LmdldEVsZW1lbnRCeUlkKCJj b25zb2xlIik7CiAgY29uc3QgZm9vID0gZG9jdW1lbnQuZ2V0RWxlbWVudEJ5SWQoImZvbyIpOwog IAogIGZ1bmN0aW9uIGxvZyhtc2cpCiAgewogICAgY29uc29sZS50ZXh0Q29udGVudCArPSBtc2cg KyAiXG4iOwogIH0KICAKICBsb2coIlRoZSBuZXh0IGxpbmUgc2hvdWxkIHByaW50IGBjYWxjKDEw JSArIDEwcHgpYDoiKQogIGxvZyh3aW5kb3cuZ2V0Q29tcHV0ZWRTdHlsZShmb28pLnRleHRJbmRl bnQpOwo8L3NjcmlwdD4K