JavaScript onanimationstart Event
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JavaScript onanimationstart Event
The onanimationstart event occurs when a CSS Animation has started.
Note: If there is an animation-delay, this event will fire once the delay period has expired.
onanimationstart Event as Attribute
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<head>
<style>
h2 {
color: blue;
-webkit-animation: myMultiColor 1s infinite;
animation: myMultiColor 1s infinite;
}
/* Safari 4.0 - 8.0 */
@-webkit-keyframes myMultiColor {
from {color: blue;}
to {color: green;}
}
/* Standard syntax */
@keyframes myMultiColor {
from {color: blue;}
to {color: green;}
}
</style>
</head>
<body>
<h2 onanimationstart="myFunction()">Animation is Awesome</h2>
<p id="point"></p>
<script>
function myFunction() {
document.getElementById("point").innerHTML = "Animation started!";
}
</script>
</body>
</html>
Syntax
As Attribute
<element onanimationstart = "JavaScript">
As Property
window.onanimationstart = function(){
// code
};
Using Event Listener
object.addEventListener("animationstart" , myScript);
onanimationstart Event as Property
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<head>
<style>
h2 {
color: blue;
-webkit-animation: myMultiColor 1s infinite;
animation: myMultiColor 1s infinite;
}
/* Safari 4.0 - 8.0 */
@-webkit-keyframes myMultiColor {
from {color: blue;}
to {color: green;}
}
/* Standard syntax */
@keyframes myMultiColor {
from {color: blue;}
to {color: green;}
}
</style>
</head>
<body>
<h2>Animation is Awesome</h2>
<p id="point"></p>
<script>
function myFunction() {
document.getElementById("point").innerHTML = "Animation started!";
}
window.onanimationstart = myFunction;
</script>
</body>
</html>
Using addEventListener() Method
Note: The addEventListener() method is not supported in Internet Explorer 8 and below.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<head>
<style>
h2 {
color: blue;
-webkit-animation: myMultiColor 1s infinite;
animation: myMultiColor 1s infinite;
}
/* Safari 4.0 - 8.0 */
@-webkit-keyframes myMultiColor {
from {color: blue;}
to {color: green;}
}
/* Standard syntax */
@keyframes myMultiColor {
from {color: blue;}
to {color: green;}
}
</style>
</head>
<body>
<h2>Animation is Awesome</h2>
<p id="point"></p>
<script>
var x = document.getElementsByTagName("h2")[0];
function myFunction() {
document.getElementById("point").innerHTML = "Animation started!";
}
x.addEventListener("animationstart", myFunction);
</script>
</body>
</html>
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