javascript addeventlistener
var element = document.getElementById("#id");
element.addEventListener('click', function(){
console.log("click");
});javascript addeventlistener
var element = document.getElementById("#id");
element.addEventListener('click', function(){
console.log("click");
});addEventListener call only once
var list = document.getElementsByTagName('ul')[0]
list.addEventListener('click', function(e){
var el = e.target
// walk up the tree until we find a LI item
while (el && el.tagName !== 'LI') {
el = el.parentNode
}
console.log('item clicked', el)
},{ once: true }) // when we use once as true, it will never call againaddEventListener
<body style="height: 5000px">
<script>
function snap(destination) {
if (Math.abs(destination - window.scrollY) < 3) {
scrollTo(window.scrollX, destination);
} else if (Math.abs(destination - window.scrollY) < 200) {
scrollTo(window.scrollX, window.scrollY + ((destination - window.scrollY) / 2));
setTimeout(snap, 20, destination);
}
}
var timeoutId = null;
addEventListener("scroll", function() {
if (timeoutId) clearTimeout(timeoutId);
timeoutId = setTimeout(snap, 200, parseInt(document.getElementById('snaptarget').style.top));
}, true);
</script>
<div id="snaptarget" class="snaptarget" style="position: relative; top: 200px; width: 100%; height: 200px; background-color: green"></div>
</body>Copyright © 2021 Codeinu
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