Bug 231493

Summary: Sticky element nested inside a sticky container is jumpy
Product: WebKit Reporter: jtran040
Component: ScrollingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: mrobinson, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari 15   
Hardware: Mac (Intel)   
OS: macOS 10.15   
Attachments:
Description Flags
a screencast
none
Testcase none

jtran040
Reported 2021-10-10 16:47:11 PDT
Created attachment 440743 [details] a screencast It is similar to bug : https://bugs.webkit.org/show_bug.cgi?id=197660 However this one occurs in Safari 15 with a Mac(Intel). Example URL: https://x80lf.csb.app Steps to reproduce: 1. Open attached url 2. Scroll vertically What is the expected behaviour? The fixed purple cell should remain in the same position when scrolling. What went wrong? The fixed purple cell is jumpy and disappears and then reappears while scrolling fast with the mouse wheel. If you remove position:sticky from the outside container, then it works as expected.
Attachments
a screencast (1.46 MB, video/quicktime)
2021-10-10 16:47 PDT, jtran040 		no flags
Details
Testcase (1.30 KB, text/html)
2021-10-12 03:33 PDT, Sam Sneddon [:gsnedders] 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Sam Sneddon [:gsnedders]
Comment 1 2021-10-12 03:33:09 PDT
Created attachment 440915 [details] Testcase
Radar WebKit Bug Importer
Comment 2 2021-10-17 16:48:19 PDT
<rdar://problem/84351939>
Martin Robinson
Comment 3 2021-11-09 03:50:30 PST
I think this might be a duplicate of bug 199915. Can you confirm whether or not this is failing with Safari Technology Preview (https://developer.apple.com/safari/technology-preview/)? Thanks!
Martin Robinson
Comment 4 2021-11-09 03:52:39 PST
I've tested this, so I'm marking it as a duplicate, but if this is still failing I can reopen the issue. *** This bug has been marked as a duplicate of bug 199915 ***
jtran040
Comment 5 2022-01-12 14:21:39 PST
Thank you for fixing this. I've tested it in Safari Technology Preview and it is working as expected.
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