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herrernst/touchmove-prevent.html

Created September 6, 2017 12:15
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safari touchmove event preventDefault
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touchmove-prevent.html
<!doctype html>
<meta name="viewport" content="initial-scale=1">
<h1>safari touchmove event preventDefault</h1>
<div style="width: 300px; height: 300px; background: green"></div>
<h2>works</h2>
<pre>
document.addEventListener("touchmove", (e) => e.preventDefault())
</pre>
<h2>works</h2>
<pre>
document.addEventListener("touchstart", (e) => {
console.log("touchstart")
})
document.addEventListener("touchmove", (e) => {
e.preventDefault();
console.log("touchmove, should prevent")
})
</pre>
<h2>doesn't work</h2>
<pre>
document.addEventListener("touchstart", (e) => {
console.log("touchstart")
document.addEventListener("touchmove", (e) => {
e.preventDefault();
console.log("touchmove, should prevent")
})
})
</pre>
<h2>doesn't work</h2>
<pre>
document.addEventListener("touchstart", (e) => {
console.log("touchstart")
})
setTimeout(() => {
document.addEventListener("touchmove", (e) => {
e.preventDefault();
console.log("touchmove, should prevent")
})
}, 0)
</pre>
<script>
//copypaste cases from above to test here
</script>
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