249594 2022-12-19 10:41:32 -0800 HTML details marker does not update when CSS display: contents is applied 2024-11-23 11:33:33 -0800 1 1 1 Unclassified WebKit Layout and Rendering Safari 16 Mac (Intel) macOS 13 RESOLVED DUPLICATE 157323 BrowserCompat, InRadar P2 Normal --- 252223 1 sime.vidas webkit-unassigned bfulgham darin.senneff karlcow ntim simon.fraser webkit-bug-importer zalan oldest_to_newest 1920518 0 sime.vidas 2022-12-19 10:41:32 -0800 Steps to reproduce: 1. Open https://jsbin.com/yaxizom/edit?html,css,output 2. Click “Details” What happened: The triangle marker ▶︎ does not change. What should have happened: The marker should have turned down (▼). It does in Chrome and Firefox. 1920526 1 sime.vidas 2022-12-19 10:53:33 -0800 I’ve checked how VoiceOver is affected. The collapsed state is announced, but the expanded state isn’t. 1920670 2 karlcow 2022-12-19 18:08:46 -0800 In the section https://drafts.csswg.org/css-display/#unbox > Appendix B: Effects of display: contents on Unusual Elements > Some elements aren’t rendered purely by CSS box concepts; > for example, replaced elements (such as img), many form > controls (such as input), and SVG elements. > > This appendix defines how they interact with display: contents. > > HTML Elements > > … cut for brevity … > > button > details > fieldset > These elements don’t have any special behavior; display: contents > simply removes their principal box, and their contents render as normal. > https://searchfox.org/wubkat/rev/05f693e31a84e598a51d00bf3505f1e10049bbc5/Source/WebCore/html/HTMLSummaryElement.cpp 1920671 3 webkit-bug-importer 2022-12-19 18:08:57 -0800 <rdar://problem/103539240> 1920672 4 karlcow 2022-12-19 18:11:31 -0800 I wonder if it's related to https://searchfox.org/wubkat/rev/05f693e31a84e598a51d00bf3505f1e10049bbc5/Source/WebCore/rendering/RenderDetailsMarker.cpp#143-155 1990872 5 darin.senneff 2023-11-08 09:28:45 -0800 Confirmed that this is still present in Safari 17.1 on MacOS. Adding the CSS "display: contents;" on the 'details' element causes the disclosure triangle to remain pointing sideways in both open and expanded states. 2077303 6 ntim 2024-11-23 11:33:33 -0800 Fixed by bug 157323. *** This bug has been marked as a duplicate of bug 157323 ***