[Webkit-unassigned] [Bug 177484] New: requestAnimationFrame should execute before the next frame

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177484

            Bug ID: 177484
           Summary: requestAnimationFrame should execute before the next
                    frame
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jaffathecake at gmail.com

According to https://html.spec.whatwg.org/multipage/webappapis.html#event-loop-processing-model, any queued requestAnimationFrame callbacks should be executed before the next recalc/layout/paint. Safari seems to execute them afterwards.

https://safari-raf-bug.glitch.me/ - the box should move to the right, but in WebKit it moves to the left.

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