Bug 121574 - Positioned element not rendering outside positioned parent with 'overflow', 'z-index' and '-webkit-transform'
Summary: Positioned element not rendering outside positioned parent with 'overflow', '...
Status: RESOLVED CONFIGURATION CHANGED
Alias: None
Product: WebKit
Classification: Unclassified
Component: CSS (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-09-18 14:28 PDT by Lachlan Hunt
Modified: 2022-07-13 15:06 PDT (History)
2 users (show)

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Description Lachlan Hunt 2013-09-18 14:28:19 PDT 
When an element with 'fixed' positioning is within a container that with either 'fixed' or 'absolute' positioning and with 'overflow' anything but 'visible', the inner element is not rendered if it is positioned outside the boundaries of the container when a third positioned element is underneath either of them, and has a lower z-index than the container.

See test case.

http://lachy.id.au/dev/css/bugs/webkit/positioning-bug.html
Comment 1 ae 2018-02-24 05:55:52 PST 
Any word on this? It's now 4.5 years old and still exists in latest iOS WKWebView...
Comment 2 Brent Fulgham 2022-07-13 15:06:44 PDT 
Safari, Chrome, and Firefox all agree on rendering for this test case. I don't believe there is any remaining compatibility issue.