[Webkit-unassigned] [Bug 203364] New: Pointer Events aren't properly captured when event target is nested

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=203364

            Bug ID: 203364
           Summary: Pointer Events aren't properly captured when event
                    target is nested
           Product: WebKit
           Version: Safari 13
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: UI Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: david.bismut at gmail.com

I found that capturing a pointer id doesn't work properly if the source element of the pointer down event is nested inside the node bound to the event listener.
Here is a repro sandbox:

https://codesandbox.io/s/twilight-dew-76ii9

Using an iPhone with iOS 13.2 beta, I noticed that the green square stops registering events when you start dragging inside the inner node as soon as your finger moves out of the green square.

Reproduction steps:

1. Touch the green square inside the `drag me` node
2. Move your finger outside of the green square
3. You should notice that the log element stops updating as soon as your finger moves out of the green square.
4. If you do the same starting from outside the `drag me` inner node (but still inside green square), you should see the log updating even when your finger moves out of the green square.
5. If you do the same on the pink square, you should see the log updating even when your finger moves out of the pink square.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20191024/c7befbb9/attachment-0001.htm>