Bug 210822

Summary: iframe with background-attachment: fixed needs to scroll synchronously
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: ScrollingAssignee: Nobody <webkit-unassigned>
Status: ASSIGNED    
Severity: Normal CC: simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   

Simon Fraser (smfr)
Reported 2020-04-21 16:13:03 PDT
An iframe whose content has background-attachment: fixed needs to fall into the synchronous scrolling path.
Attachments
Radar WebKit Bug Importer
Comment 1 2020-04-21 16:13:17 PDT
Simon Fraser (smfr)
Comment 2 2020-04-21 16:18:09 PDT
This is an ordering dependency between calling scrollingCoordinator->frameViewFixedObjectsDidChange() and creating the subframe's scrolling node.
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