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A brief discussion on the callback processing method of CSS3 animation
A brief discussion on the callback processing method of CSS3 animation
When we do js animation, we often need to do callback processing, such as triggering an event after one animation is completed, executing another animation after one animation is completed, etc., but can it be captured when using CSS3 animation? What about callback processing for motion status?
CSS3 animation can also be processed with callbacks. It is divided into two attributes, one is transition [w3c document] and the other is animation [w3c document].
1. Transition
For transition, you can listen to the transitionend event and trigger it when the animation is completed. You can use it like this:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css3-transitionend - BeyondWeb</title>
<style>
* {margin: 0; padding: 0;}
.rect {
width: 100px;
height: 100px;
background-color: #f80;
-webkit-transition: all .5s;
}
</style>
<script>
window.onload = function () {
var _rect = document.querySelector('.rect');
_rect.onclick = function () {
_rect.style.webkitTransform = 'translateX(300px)';
}
_rect.addEventListener('webkitTransitionEnd', function () {
alert('动画执行完毕！');
// callback here
}, false);
}
</script>
</head>
<body>
<p class="rect"></p>
</body>
</html>2. animation
For animation we can listen to the animationend event, the sample code is as follows:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css3-animationend - BeyondWeb</title>
<style>
* {margin: 0; padding: 0;}
.rect {
position: relative;
width: 100px;
height: 100px;
background-color: #f80;
}
@-webkit-keyframes move {
from {
-webkit-transform: rotate(0);
}
to {
-webkit-transform: rotate(360deg);
}
}
</style>
<script>
window.onload = function () {
var _rect = document.querySelector('.rect');
_rect.onclick = function () {
_rect.style.webkitAnimation = 'move 3s';
}
_rect.addEventListener('webkitAnimationEnd', function () {
alert('动画执行完毕！');
// callback here
}, false);
}
</script>
</head>
<body>
<p class="rect"></p>
</body>
</html>is about some content about CSS3 animation callback processing. It was recently used when making H5 pages. Let’s summarize.
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