改变 <div> 元素的 animationDirection 属性 - 在线编辑器

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.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”按钮方向播放动画。</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>
​x
 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.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;
      }
    }