碰到的问题：在第一次点击实现动画结束后，再点击无法实现动画；
解决：动画结束后要清除元素的动画属性；
x.style.WebkitAnimation = ""; // Chrome, Safari 和 Opera 代码
x.style.animation = "";
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<style>
#myDIV {
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>
<p>该实例使用了 addEventListener() 方法为 DIV 元素添加"animationstart", "animationiteration" 和 "animationend" 事件。</p>
<div id="myDIV" onclick="myFunction()">点我开始动画</div>
<script>
var x = document.getElementById("myDIV")
// 使用 JavaScript 开始动画
function myFunction() {
x.style.WebkitAnimation = "mymove 4s 2"; // Chrome, Safari 和 Opera 代码
x.style.animation = "mymove 4s 2";
}
// Chrome, Safari 和 Opera
x.addEventListener("webkitAnimationStart", myStartFunction);
x.addEventListener("webkitAnimationIteration", myIterationFunction);
x.addEventListener("webkitAnimationEnd", myEndFunction);
x.addEventListener("animationstart", myStartFunction);
x.addEventListener("animationiteration", myIterationFunction);
x.addEventListener("animationend", myEndFunction);
function myStartFunction() {
this.innerHTML = "animationstart 事件触发 - 动画已经开始";
this.style.backgroundColor = "pink";
}
function myIterationFunction() {
this.innerHTML = "animationiteration 事件触发 - 动画重新播放";
this.style.backgroundColor = "lightblue";
}
function myEndFunction() {
this.innerHTML = "animationend 事件触发 - 动画已经完成";
this.style.backgroundColor = "lightgray";
x.style.WebkitAnimation = ""; // Chrome, Safari 和 Opera 代码
x.style.animation = "";
}
</script>
</body>
</html>