[Webkit-unassigned] [Bug 191750] New: Transition all css rule on input with background image set by css custom property causes continuous rerendering

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191750

            Bug ID: 191750
           Summary: Transition all css rule on input with background image
                    set by css custom property causes continuous
                    rerendering
           Product: WebKit
           Version: Safari 12
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jus at bitgrid.net

The following example will continuously rerender on Safari 11/12 because the styles are recalculated and therefore cause a high CPU load on the website that uses such a CSS rule.

https://codepen.io/juliushaertl/pen/yQXrao

This only happens on input elements with a background image that is set via a css custom property and the transition: all 100ms; rule set. When changing to `transition: width 100ms;` everything is fine.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20181116/3821b75d/attachment.html>