[Webkit-unassigned] [Bug 227478] New: [css-scroll-snap] Triggering a layout during scroll causes jittery scrolling on Mac when dragging the scrollbar

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=227478

            Bug ID: 227478
           Summary: [css-scroll-snap] Triggering a layout during scroll
                    causes jittery scrolling on Mac when dragging the
                    scrollbar
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mrobinson at webkit.org
                CC: simon.fraser at apple.com

When a page trigger layout during scroll events and with scroll snap, dragging the scrollbar on a Mac causes a lot of jitter while scrolling. The issue is that during layout the code is trying to snap. Each new movement of the scroll bar unsnaps briefly and then the relayout snaps again.

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