267046 2024-01-03 08:51:47 -0800 REGRESSION (Safari 17): Named at-rule container skipped when container named in a :host selector 2024-02-02 22:48:37 -0800 1 1 1 Unclassified WebKit CSS Safari 17 Mac (Intel) macOS 14 RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=267793 https://github.com/web-platform-tests/wpt/pull/44383 BrowserCompat, InRadar P2 Normal --- 268683 1 studio koivisto ahmad.saleem792 karlcow kizmarh koivisto mail ntim seemann simon.fraser webkit-bug-importer oldest_to_newest 2002784 0 studio 2024-01-03 08:51:47 -0800 When a container-name property is added to a `:host` selector, the @container using that name will be skipped. A named @container in Safari 17 fails: `@container hello (width > 400px) {}` A @container without a name in Safari 17 works: `@container (width > 400px) {}` Note that this bug doesn't occur on Safari 16. Moving the container-name property to an element inside the Shadow DOM does work. Example(s) on Codepen: https://codepen.io/dutchcelt/pen/oNVbXPd 2002800 1 webkit-bug-importer 2024-01-03 10:41:23 -0800 <rdar://problem/120428386> 2002805 2 ahmad.saleem792 2024-01-03 11:00:07 -0800 It is broken on WebKit ToT (272613@main) where 'Hello World' is different compared to Firefox Nightly 123 and Chrome Canary 122. Adding 'BrowserCompat' as well. 2003371 3 seemann 2024-01-06 07:20:31 -0800 It had worked up to (including) Safari 17.1. It broke on iOS with Safari 17.2-beta+1 (iOS 17.2 Seed 1 (21C5029g)). I've filed a feedback in November '23 which has been unnoticed up to now. https://feedbackassistant.apple.com/feedback/13348441 2010064 4 koivisto 2024-02-02 04:27:11 -0800 Pull request: https://github.com/WebKit/WebKit/pull/23738 2010084 5 ews-feeder 2024-02-02 07:09:33 -0800 Committed 273987@main (14e1048a543f): <https://commits.webkit.org/273987@main> Reviewed commits have been landed. Closing PR #23738 and removing active labels. 2010085 6 koivisto 2024-02-02 07:18:42 -0800 Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/44383 2010330 7 koivisto 2024-02-02 22:48:20 -0800 This fix did not fix the ::slotted case that was also demonstrated by the original test case. Filed https://bugs.webkit.org/show_bug.cgi?id=268683 for that.