CODEWITHSUNDEEP
androidwebview
asdjfiasd
asdjfiasd

Reputation: 1730

Android System WebView 85.0.4183.81 - touchmove event is only firing at 3fps

Yesterday I updated Android System WebView to 85.0.4182.81 on Android 10 phone. Before, the touchmove event was firing 100 fps or so, very smooth. Now it is like 3 FPS.

   var n = 0;
    window.addEventListener('touchmove', function () {
        n++;
        document.body.textContent = n;
    });
 
    Touch and move here

You may not be abble to test snippet here so you can test it here: https://ghost.sk/touch.html Don't test in chrome for android because it has it's own version of webview without this bug. Is there a way to fix this?

Edit: the workaround is first accepted answer but it is a real issue, here is related bugreport: https://bugs.chromium.org/p/chromium/issues/detail?id=1123304

Upvotes: 1

Views: 491

Answers (1)

ksfreitas
ksfreitas

Reputation: 36

After many hours researching, I found a solution (https://bugs.chromium.org/p/chromium/issues/detail?id=1072364):

Try add a preventDefault() in touchmove event:

    var n = 0;
    window.addEventListener('touchmove', function (e) {
        n++;
        document.body.textContent = n;
        e.preventDefault();
    }, {passive: false});

Upvotes: 2

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