[Webkit-unassigned] [Bug 232339] New: setPointerCapture should maintain the mouse cursor until pointerup or releasePointerCapture

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232339

            Bug ID: 232339
           Summary: setPointerCapture should maintain the mouse cursor
                    until pointerup or releasePointerCapture
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Enhancement
          Priority: P2
         Component: UI Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: caleb at chearon.net

Both Firefox and Chrome use the CSS cursor of the element subject to the setPointerCapture call until releasePointerCapture or pointerup, no matter what other elements are under the mouse while it moves. This isn't directly mentioned in the W3C spec, but it does fit with the idea of the element taking over events.

Currently in Safari you have to throw up an overlay to keep the cursor the same, and even that doesn't work when the mouse goes out of the browser window.

This would be really great to have in Safari as it gives it a smoother/native feel.

Test case: https://jsfiddle.net/v4yteo6a/

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