javascript onclick event listener
document.getElementById("myBtn").addEventListener("click", function() {
alert("Hello World!");
});javascript onclick event listener
document.getElementById("myBtn").addEventListener("click", function() {
alert("Hello World!");
});event listener javascript
const element = document.querySelector(".class__name");
element.addEventListener("click", () => {
console.log("clicked element");
});javascript pass parameter to event listener
var someEventHander=function(){
console.log(event,param1,param2);
}
//add listener
document.getElementById("someid").addEventListener('click',someEventHander.bind(event,param1,param2));event listener javascript
//DOM Level 2 Event Listener (Advanced technique to call an event)
document.getElementById("btn2").addEventListener('click', () => {
alert("hello world");
}, false);
//our third param of DOM Level 2 Event Listener
// false = event trigger from bottom to top(bubbling phase)
// true = event trigger from top to bottom (capturing phase)
//TRADITIONAL DOM EVENT HANDLERS (very old)
function show_alert() {
alert("hello world");
}
document.getElementById("btn1").onclick = show_alert;addEventListener
<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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