html运行实例（event_animationstart）-搜寻教程库

代码示例：（标识：event_animationstart）
<!DOCTYPE html>
<html>
<head>
<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>本例使用 addEventListener() 方法将 "animationstart"、"animationiteration" 以及 "animationend" 事件附加到 DIV 元素。</p>

<div id="myDIV" onclick="myFunction()">点击我开始动画</div>

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

// Start the animation with JavaScript
function myFunction() {
  x.style.WebkitAnimation = "mymove 4s 2"; // 针对 Chrome、Safari 和 Opera 的代码
  x.style.animation = "mymove 4s 2";     // 标准语法
}

// 针对 Chrome、Safari 和 Opera 的代码
x.addEventListener("webkitAnimationStart", myStartFunction);
x.addEventListener("webkitAnimationIteration", myRepeatFunction);
x.addEventListener("webkitAnimationEnd", myEndFunction);

// 标准语法
x.addEventListener("animationstart", myStartFunction);
x.addEventListener("animationiteration", myRepeatFunction);
x.addEventListener("animationend", myEndFunction);

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

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

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

</body>
</html>