[Webkit-unassigned] [Bug 149681] New: Latch does not clear when a scroll snap animation is triggered

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149681

            Bug ID: 149681
           Summary: Latch does not clear when a scroll snap animation is
                    triggered
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org

The blog post about the new scroll snap feature identified a bug in the latching logic.

Steps to reproduce:
1. Create a web page with two (or more) <div> elements holding content with scroll snap style turned on.
2. Perform a trackpad or mouse wheel move in the top element to trigger a scroll snap "glide" so that it animates to its second position.
3. Perform another trackpad or mouse wheel move (in the top element) to trigger a scroll snap "snap back" to the second position.
4. Move the mouse pointer to the lower <div> element.
5. Perform a trackpad or mouse wheel move in the bottom element to move the div content.

The bottom div should scroll (or scroll-snap), but the bug causes the top element to hold latch state. This causes the top div to move instead of the div the user is interacting with.

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