[Webkit-unassigned] [Bug 186094] New: mouseout and mouseleave should not be dispatched on removed DOM node

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186094

            Bug ID: 186094
           Summary: mouseout and mouseleave should not be dispatched on
                    removed DOM node
           Product: WebKit
           Version: Safari 11
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: flackr at chromium.org

Visit http://output.jsbin.com/sekaqit
Move the mouse over the gray hover me box
The mouseenter listener removes the gray box

According to https://www.w3.org/TR/uievents/#events-mouseevent-event-order:

If the event target (e.g. the target element) is removed from the DOM during the mouse events sequence, the remaining events of the sequence MUST NOT be fired on that element.

However, in Safari the mouseout and mouseleave events are fired. If you delay removing the DOM node, they are fired the next time the mouse is moved.

If my reading of the spec is correct, Safari should not be dispatching mouseout and mouseleave on the removed node.

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