312477 2026-04-16 08:54:17 -0700 Flexbox: calc(infinity) flex-grow factor fails to stretch item to 100% width. 2026-04-29 10:02:07 -0700 1 1 1 Unclassified WebKit Layout and Rendering Safari 26 Mac (Apple Silicon) macOS 26 RESOLVED FIXED https://github.com/web-platform-tests/wpt/pull/59547 InRadar P2 Normal --- 1 nileshprajapati sgill26 bfulgham sgill26 simon.fraser webkit-bug-importer zalan oldest_to_newest 2201071 0 nileshprajapati 2026-04-16 08:54:17 -0700 Hi Webkit, Issue: When resizing the window to a smaller viewport, the following demo fails to fill the remaining space in Safari. To illustrate the problem, I recommend adding a red background to the main window. https://codepen.io/amit_sheen/pen/dPpjEOv/6896f83a17a23d0f92099c3d7ad40b83?editors=1100 Ref: https://frontendmasters.com/blog/building-a-ui-without-breakpoints/ The issue is not present in either Chrome or Firefox and works as expected. It fills the remaining space at a smaller viewport size. Thanks, Nilesh 2201167 1 ap 2026-04-16 12:02:04 -0700 *** Bug 312476 has been marked as a duplicate of this bug. *** 2201185 2 nileshprajapati 2026-04-16 12:53:47 -0700 *To illustrate the problem, I recommend adding a red background to the main element. 2203711 3 webkit-bug-importer 2026-04-23 08:55:13 -0700 <rdar://problem/175431146> 2203808 4 sgill26 2026-04-23 12:16:08 -0700 Pull request: https://github.com/WebKit/WebKit/pull/63453 2204162 5 ews-feeder 2026-04-24 09:35:42 -0700 Committed 311956@main (32309d175884): <https://commits.webkit.org/311956@main> Reviewed commits have been landed. Closing PR #63453 and removing active labels. 2205818 6 sgill26 2026-04-29 10:02:07 -0700 Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/59547