[javascript] Touch move getting stuck Ignored attempt to cancel a touchmove

I know this is an old post but I had a lot of issues trying to solve this and I finally did so I wanted to share.

My issue was that I was adding an event listener within the ontouchstart and removing it in the ontouchend functions - something like this

function onTouchStart() {
  window.addEventListener("touchmove", handleTouchMove, {
    passive: false
  });
}

function onTouchEnd() {
  window.removeEventListener("touchmove", handleTouchMove, {
    passive: true
  });
}

function handleTouchMove(e) {
  e.preventDefault();
}

For some reason adding it removing it like this was causing this issue of the event randomly not being cancelable. So to solve this I kept the listener active and toggled a boolean on whether or not it should prevent the event - something like this:

let stopScrolling = false;

window.addEventListener("touchmove", handleTouchMove, {
  passive: false
});

function handleTouchMove(e) {
  if (!stopScrolling) {
    return;
  }
  e.preventDefault();
}

function onTouchStart() {
  stopScrolling = true;
}

function onTouchEnd() {
  stopScrolling = false;
}

I was actually using React so my solution involved setting state, but I've simplified it for a more generic solution. Hopefully this helps someone!

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