259261 2023-07-16 06:18:11 -0700 [popover] element within shadow DOM breaks light dismiss calculation 2023-10-10 07:04:36 -0700 1 1 1 Unclassified WebKit DOM Safari Technology Preview Unspecified Unspecified RESOLVED FIXED https://github.com/web-platform-tests/wpt/pull/41251 InRadar P2 Normal --- 148695 250171 1 westbrook.johnson ntim cdumez ntim rniwa webkit-bug-importer zsun oldest_to_newest 1966965 0 westbrook.johnson 2023-07-16 06:18:11 -0700 When a [popover] element that is a descendant of an open [popover] element exists within a shadow DOM, the topmost clicked [popover] element (https://html.spec.whatwg.org/multipage/popover.html#topmost-clicked-popover) calculation is no done with the composed path which causes the descendant [popover] element to close the ancestor [popover] element at open time. You can repro this here: https://codepen.io/Westbrook/pen/BaGrdoq With the following code: <button popovertarget="popover" popovertargetaction="toggle">Toggle</button> <div id="popover" popover> <template shadowrootmode="open"> Outter <button popovertarget="popover-2" popovertargetaction="toggle">Toggle</button> <div id="popover-2" popover> Inner </div> </template> </div> 1966983 1 ntim 2023-07-16 15:06:17 -0700 https://searchfox.org/wubkat/rev/3ae98fa2c02b272e3e55c4e0c324d01da17cb5dc/Source/WebCore/dom/Document.cpp#8903 should probably iterate using `parentElementInComposedTree()`. 1967049 2 webkit-bug-importer 2023-07-17 10:09:39 -0700 <rdar://problem/112410375> 1968888 3 ntim 2023-07-31 11:16:45 -0700 Pull request: https://github.com/WebKit/WebKit/pull/16234 1968889 4 ntim 2023-07-31 11:20:03 -0700 Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/41251 1968911 5 ews-feeder 2023-07-31 13:05:27 -0700 Committed 266457@main (9336846dfe3b): <https://commits.webkit.org/266457@main> Reviewed commits have been landed. Closing PR #16234 and removing active labels. 1983982 6 zsun 2023-10-10 07:04:36 -0700 @ntim Tim, I noticed the result of the introduced test at https://wpt.fyi/results/html/semantics/popovers/popover-light-dismiss-flat-tree.html?label=master&label=experimental&aligned. Gecko has the same error report too (with popover enabled). Any idea?