イベントリスナーを一度だけ実行する once
<body style="width: 200vw; height: 200vh">
<script>
const option = { once: true };
window.addEventListener("scroll", func, option);
function func() {
console.log(scrollX, scrollY);
}
</script>
</body><body style="width: 200vw; height: 200vh">
<script>
const option = { once: true };
window.addEventListener("scroll", func, option);
function func() {
console.log(scrollX, scrollY);
}
</script>
</body>