[Webkit-unassigned] [Bug 195052] New: Gesture events do not cross the shadow boundary

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=195052

            Bug ID: 195052
           Summary: Gesture events do not cross the shadow boundary
           Product: WebKit
           Version: Safari 12
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: UI Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dxu at adobe.com

Right now gesturestart and gesturechange events will cause zooming to occur in Safari by default. For a web application that uses web components and needs to prevent this default behavior from occurring, there is no way to do this without adding an event handler for gesturestart and gesturechange to every custom component.

Please see below for a simple example of this issue:
https://jsfiddle.net/60mzfj2x/

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