Bug 196946

Summary: CSS background-color transition flickers
Product: WebKit Reporter: Ben Nyberg <ben>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: dino, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari 12   
Hardware: Mac   
OS: macOS 10.14   
URL: https://reprod-safari-bug-ekufemrdfl.now.sh
Attachments:
Description Flags
Gif of what I am seeing on my machine none

Ben Nyberg
Reported 2019-04-15 16:03:57 PDT
Created attachment 367470 [details] Gif of what I am seeing on my machine Please take a look at the following page: https://reprod-safari-bug-ekufemrdfl.now.sh Every second, a class is toggled that is intended to toggle the background-color and color properties of the #site-mast element. In the current version of Safari, the background-color flickers. Removing the background-color CSS transition seems to fix this. Please let me know if you need any more info, or if I can provide any more details.
Attachments
Gif of what I am seeing on my machine (243.99 KB, image/gif)
2019-04-15 16:03 PDT, Ben Nyberg 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2019-04-15 18:21:26 PDT
<rdar://problem/49926199>
Simon Fraser (smfr)
Comment 2 2019-04-15 21:20:04 PDT
Looks like we're failing to mark the layer as non-opaque when the background-color changes from something opaque to something non-opaque.
Simon Fraser (smfr)
Comment 3 2019-06-01 19:54:50 PDT
Fixed by 197654. *** This bug has been marked as a duplicate of bug 197654 ***
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