[Webkit-unassigned] [Bug 181954] TouchMove event contains incorrect clientX / clientY after window scroll

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=181954

Toby Zerner <toby.zerner at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |toby.zerner at gmail.com

--- Comment #8 from Toby Zerner <toby.zerner at gmail.com> ---
Would love to see this fixed as there's not really a nice workaround. For now I've got this at the start of my touchmove event handler:

let cancelNextMoveEvent = true;

document.addEventListener('touchmove', function() {
    if (cancelNextMoveEvent) {
        cancelNextMoveEvent = false;
        return;
    }
    cancelNextMoveEvent = true;

    // my handler code
}, { passive: false });

This means my handler will only be run on every second touchmove event, which seems to do the trick for the most part - but sometimes I do still get incorrect clientY values.

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