[Webkit-unassigned] [Bug 163207] touchmove event can't be default prevented

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163207

--- Comment #4 from Chris Dumez <cdumez at apple.com> ---
(In reply to comment #3)
> (In reply to comment #2)
> > This is <rdar://problem/28693432>.
> 
> I investigated it yesterday and believe I found a workaround that Web
> authors can adopt until we fix this:
> http://codepen.io/anon/pen/QKxpPg
> 
> You basically need to listen for the "touchforcechange" event and call
> preventDefault() on this one as well.

I think the fix is likely to return false early in ScrollAnimatorIOS::handleTouchEvent() if the touch event is a TouchForceChange but I am not an expert in the area.

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