<!DOCTYPE html>
<html>
<head>
<style>
div { width: 100px;
height: 100px;
background: red;
position: relative;
animation: mymove 5s infinite;
animation-delay: 10s;
}
@keyframes mymove { from {left: 0px;} to {left: 200px;}}
</style>
</head>
<body>
<p>动画将在页面加载完成 10 秒后开始。</p>
<p>单击“试一试”按钮可将动画延迟减少到三秒。</p>
<button onclick="myFunction()">试一试</button>
<script>
function myFunction() { document.getElementById("myDIV").style.animationDelay = "3s";}
</script>
<p>请记住，延迟从页面加载完成时开始计算，而不是从您单击按钮时开始计算。</p>
<div id="myDIV"></div>
</body>
</html>