[Webkit-unassigned] [Bug 240235] New: overscroll-behavior: none doesn't prevent rubberbanding reliably in scroll-snap containers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=240235

            Bug ID: 240235
           Summary: overscroll-behavior: none doesn't prevent
                    rubberbanding reliably in scroll-snap containers
           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: augus.dupin at gmail.com
                CC: simon.fraser at apple.com

Created attachment 459044

  --> https://bugs.webkit.org/attachment.cgi?id=459044&action=review

testcase

Hello. Here is a bug related to `overscroll-behavior: none`, which is not working as intended in Safari TP.

`overscroll-behavior: none` should prevent all rubberbanding, and indeed does in a normal scroll container. In a scroll-snap container however, it doesn't prevent it reliably.

How to reproduce the issue in the test case:
- in the vertical scroll container, scroll all the way up or down relatively fast, and see rubberbanding
- in the horizontal scroll container, scroll all the way left or right relatively fast, and see rubberbanding

See the video for what to look for.

Note, as indicated in the test case, that you might encounter this other bug related to rubberbanding: https://bugs.webkit.org/show_bug.cgi?id=236536, as well as this one related to overscroll-behavior in horizontal scroll containers: https://bugs.webkit.org/show_bug.cgi?id=240183.

Please let me know if you need more information.

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