Javascript DOM animationstart Event

Introduction

This example uses the addEventListener() method to attach an "animationstart", "animationiteration" and "animationend" event to a DIV element.

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<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {/* www.j  av a2  s .c  o m*/
  margin: 25px;
  width: 550px;
  height: 100px;
  background: orange;
  position: relative;
  font-size: 20px;
}

/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
  from {top: 0px;}
  to {top: 200px;}
}

@keyframes mymove {
  from {top: 0px;}
  to {top: 200px;}
}
</style>
</head>
<body>
<div id="myDIV" onclick="myFunction()">Click me to start the animation.</div>

<script>
var x = document.getElementById("myDIV");

// Start the animation with JavaScript
function myFunction() {
  x.style.WebkitAnimation = "mymove 4s 2"; // Code for Chrome, Safari and Opera
  x.style.animation = "mymove 4s 2";     // Standard syntax
}

// Code for Chrome, Safari and Opera
x.addEventListener("webkitAnimationStart", myStartFunction);
x.addEventListener("webkitAnimationIteration", myRepeatFunction);
x.addEventListener("webkitAnimationEnd", myEndFunction);

// Standard syntax
x.addEventListener("animationstart", myStartFunction);
x.addEventListener("animationiteration", myRepeatFunction);
x.addEventListener("animationend", myEndFunction);

function myStartFunction() {
  this.innerHTML = "animationstart event occurred - The animation has started";
  this.style.backgroundColor = "pink";
}

function myRepeatFunction() {
  this.innerHTML = "animationiteration event occurred - The animation was played again";
  this.style.backgroundColor = "lightblue";
}

function myEndFunction() {
  this.innerHTML = "animationend event occurred - The animation has completed";
  this.style.backgroundColor = "lightgray";
}
</script>

</body>
</html>

The animationstart event occurs when a CSS animation has started to play.

When a CSS animation plays, there are three events that can occur:

EventDescription
animationstart occurs when the CSS animation has started
animationiteration occurs when the CSS animation is repeated
animationendoccurs when the CSS animation has completed



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