[Webkit-unassigned] [Bug 184250] Unable to call event.preventDefault in dynamically added event listener

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=184250

Max Hoffmann <tsov at me.com> changed:

           What    |Removed                     |Added
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                 CC|                            |tsov at me.com

--- Comment #4 from Max Hoffmann <tsov at me.com> ---
I can confirm this for:

- Safari 11.3 on Mac OS X 10.13.3
- Safari 11.3 on iOS 11.3

Any drag and drop implementation for touch relies on calling `touchMoveEvent.preventDefault()` to cancel native scrolling. I could imagine most dnd solutions out there adding `touchmove` as child listeners.

The current workaround suggested by alexreardon at gmail.com works well, but won't work when dynamically adding `touchmove` events to other documents, like iframes.

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