[Webkit-unassigned] [Bug 196946] New: CSS background-color transition flickers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196946

            Bug ID: 196946
           Summary: CSS background-color transition flickers
           Product: WebKit
           Version: Safari 12
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ben at heyben.com

Created attachment 367470

  --> https://bugs.webkit.org/attachment.cgi?id=367470&action=review

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.

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