306237 2026-01-25 17:30:47 -0800 Style queries are buggy inside a `display: contents` container 2026-05-19 01:26:04 -0700 1 1 1 Unclassified WebKit CSS Safari 26 All All NEW https://bugs.webkit.org/show_bug.cgi?id=301871 InRadar P2 Major --- 1 benoit.rouleau webkit-unassigned karlcow koivisto smh webkit-bug-importer oldest_to_newest 2174973 0 478133 benoit.rouleau 2026-01-25 17:30:47 -0800 Created attachment 478133 Reproduction of the bug CSS container style queries behave super strangely when the container it is querying either has `display: contents` or is inside a `display: contents` wrapper. I am seeing all kinds of weirdness in a real project, but I managed to create a simple reproduction that hopefully allows you to find and fix the root cause for all of it. Check out the attached file. Thank you! 2175319 1 ap 2026-01-26 18:11:22 -0800 Thank you for the report! Is this the same as bug 301871? 2175407 2 benoit.rouleau 2026-01-27 06:04:05 -0800 Ah, probably. Sorry for my bad searching skills! 2177045 3 webkit-bug-importer 2026-02-01 17:31:11 -0800 <rdar://problem/169407119> 478133 2026-01-25 17:30:47 -0800 2026-01-25 17:30:47 -0800 Reproduction of the bug safari-bug-style-queries-display-contents.html text/html 713 benoit.rouleau PCFET0NUWVBFIGh0bWw+CjxodG1sIGxhbmc9ImVuIj4KPGhlYWQ+CiAgPG1ldGEgY2hhcnNldD0i VVRGLTgiPgogIDxtZXRhIG5hbWU9InZpZXdwb3J0IiBjb250ZW50PSJ3aWR0aD1kZXZpY2Utd2lk dGgsIGluaXRpYWwtc2NhbGU9MS4wIj4KICA8dGl0bGU+U2FmYXJpIGJ1ZyB3aXRoIGBkaXNwbGF5 OiBjb250ZW50c2AgYW5kIHN0eWxlIHF1ZXJpZXM8L3RpdGxlPgogIDxzdHlsZT4KICAgIC5jb250 ZW50cyB7CiAgICAgIGRpc3BsYXk6IGNvbnRlbnRzOwogICAgfQogIAogICAgLmNvbnRhaW5lciB7 CiAgICAgIGNvbnRhaW5lci1uYW1lOiBmb287CiAgICAgIC0tZm9vOiBiYXI7CiAgICB9CgogICAg YnV0dG9uIHsKICAgICAgYm9yZGVyOiAxcHggc29saWQgYmxhY2s7CiAgICAgIGJhY2tncm91bmQt Y29sb3I6IHdoaXRlOwoKICAgICAgQGNvbnRhaW5lciBmb28gc3R5bGUoLS1mb286IGJhcikgewog ICAgICAgIGJhY2tncm91bmQtY29sb3I6IHJlZDsKICAgICAgfQogICAgfQogIDwvc3R5bGU+Cjwv aGVhZD4KPGJvZHk+CiAgPGRpdiBjbGFzcz0iY29udGVudHMiPgogICAgPGRpdiBjbGFzcz0iY29u dGFpbmVyIj4KICAgICAgPGJ1dHRvbiB0eXBlPSJidXR0b24iPkNsaWNrIG1lIGFuZCB0aGUgYmFj a2dyb3VuZCB3aWxsIHN0b3AgYmVpbmcgcmVkIGZvciBubyByZWFzb248L2J1dHRvbj4KICAgIDwv ZGl2PgogIDwvZGl2Pgo8L2JvZHk+CjwvaHRtbD4=