Bug 275739

Summary: REGRESSION (276531@main): Content flash when expanding image viewer on eBay page
Product: WebKit Reporter: Antoine Quint <graouts>
Component: AnimationsAssignee: Antoine Quint <graouts>
Status: RESOLVED FIXED    
Severity: Normal CC: graouts, koivisto, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://github.com/web-platform-tests/wpt/pull/47084
Attachments:
Description Flags
Testcase
none
Testcase none

Antoine Quint
Reported 2024-06-21 09:23:18 PDT
With a recent STP, such as STP 196, load an eBay listing, such as https://www.ebay.com/itm/355596559276, and click the button the button to expand the image gallery (the double arrow next to the main listing image). Now exit the image viewer, and enter it again. You'll notice this second time, and all the times following that, a flash of the image viewer before it fades in. This does not happen on system Safari on macOS 14.5, or Chrome or Firefox. This has regressed with 276531@main.
Attachments
Testcase (905 bytes, text/html)
2024-07-07 12:49 PDT, Antoine Quint 		no flags
Details
Testcase (707 bytes, text/html)
2024-07-07 13:18 PDT, Antoine Quint 		no flags
Details
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Antoine Quint
Comment 1 2024-06-21 09:23:30 PDT
rdar://128178476
Antoine Quint
Comment 2 2024-06-21 09:31:39 PDT
Pull request: https://github.com/WebKit/WebKit/pull/30047
Antoine Quint
Comment 3 2024-07-07 12:49:31 PDT
Created attachment 471830 [details] Testcase It took a while but I worked out a reduction. The issue is that if an element has an animation within a container with `display: none`, touching the style on that container will resume the animation on the child, even though `display: none` is still in play.
Antoine Quint
Comment 4 2024-07-07 13:18:14 PDT
Created attachment 471831 [details] Testcase
Antoine Quint
Comment 5 2024-07-10 15:31:36 PDT
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/47084
EWS
Comment 6 2024-07-11 14:49:37 PDT
Committed 280876@main (d08faf9fab62): <https://commits.webkit.org/280876@main> Reviewed commits have been landed. Closing PR #30047 and removing active labels.
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