fmpq.com
源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> <style> div { width:100px; height:100px; background:red; position:relative; animation:mymove 5s infinite; /* Safari、Chrome 和 Opera */ -webkit-animation:mymove 5s infinite; } @keyframes mymove { from {left:0px;} to {left:200px;} } /* Safari、Chrome 和 Opera */ @-webkit-keyframes mymove { from {left:0px;} to {left:200px;} } </style> </head> <body> <p>点击“尝试一下”按钮，反转动画的方向。</p> <button onclick="myFunction()">尝试一下</button> <script> function myFunction() { document.getElementById("myDIV").style.animationDirection = "reverse"; // 针对 Chrome、Safari 和 Opera 的代码 document.getElementById("myDIV").style.WebkitAnimationDirection = "reverse"; } </script> <p><strong>注意：</strong>只有 Firefox 支持 animationDirection 属性。</p> <div id="myDIV"></div> </body> </html>
运行结果