309035 2026-03-02 20:56:52 -0800 rounding issue for svg rect height with em and percentage 2026-05-26 19:35:55 -0700 1 1 1 Unclassified WebKit SVG WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://github.com/web-platform-tests/wpt/pull/60194 http://wpt.live/svg/geometry/svg-baseval-in-display-none.html InRadar, WPTImpact P2 Normal --- 1 karlcow karlcow sabouhallawa webkit-bug-importer zimmermann oldest_to_newest 2186387 0 karlcow 2026-03-02 20:56:52 -0800 http://wpt.live/svg/geometry/svg-baseval-in-display-none.html https://wpt.fyi/results/svg/geometry/svg-baseval-in-display-none.html https://codepen.io/webcompat/pen/ogzjVyQ?editors=1010 <svg width="0" height="0"> <svg width="600" height="400" font-size="5"> <symbol width="40em" height="20em"> <g font-size="10px"> <rect id="r1" x="5em" y="6em" width="20%" height="30%"></rect> <circle id="c1" cx="5em" cy="6em" r="10em"></circle> </g> </symbol> <g font-size="10px" style="display:none"> <rect id="r2" x="5em" y="6em" width="20%" height="30%"></rect> <circle id="c2" cx="5em" cy="6em" r="10em"></circle> </g> </svg> </svg> Test Results: SAFARI r1.width = 120 (120) r1.height = 120.00000762939453 (120) r2.width = 120 (120) r2.height = 120.00000762939453 (120) CHROME/FIREFOX r1.width = 120 (120) r1.height = 120 (120) r2.width = 120 (120) r2.height = 120 (120) 2186388 1 webkit-bug-importer 2026-03-02 20:57:41 -0800 <rdar://problem/171587382> 2190899 2 karlcow 2026-03-17 00:56:38 -0700 The fact that this is failing only for height is pure luck. Width has the same issue. We should probably modify the tests that it is able to fail in the same way for width. The float parameter in convertValueFromPercentageToUserUnits(float value, ...) truncates the double result of value / 100.0 before multiplying by the viewport dimension. The fix needs to keep the computation in double precision through the multiplication, only casting to float at the end. 2190901 3 karlcow 2026-03-17 00:58:15 -0700 Pull request: https://github.com/WebKit/WebKit/pull/60750 2214812 4 ews-feeder 2026-05-26 19:18:20 -0700 Committed 313935@main (5ed9fc92e49b): <https://commits.webkit.org/313935@main> Reviewed commits have been landed. Closing PR #60750 and removing active labels. 2214821 5 karlcow 2026-05-26 19:35:55 -0700 Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/60194