与上例相同，但是通过 cubic-bezier 函数来定义速度曲线 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    div {
      width: 100px;
      height: 50px;
      background: red;
      color: white;
      font-weight: bold;
      position: relative;
      animation: mymove 5s infinite;
      -webkit-animation: mymove 5s infinite;
      /* Safari and Chrome */
    }

    #div1 {
      animation-timing-function: cubic-bezier(0, 0, 0.25, 1);
    }

    #div2 {
      animation-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
    }

    #div3 {
      animation-timing-function: cubic-bezier(0.42, 0, 1, 1);
    }

    #div4 {
      animation-timing-function: cubic-bezier(0, 0, 0.58, 1);
    }

    #div5 {
      animation-timing-function: cubic-bezier(0.42, 0, 0.58, 1);
    }
    /* Safari and Chrome: */

    #div1 {
      -webkit-animation-timing-function: cubic-bezier(0, 0, 0.25, 1);
    }

    #div2 {
      -webkit-animation-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
    }

    #div3 {
      -webkit-animation-timing-function: cubic-bezier(0.42, 0, 1, 1);
    }

    #div4 {
      -webkit-animation-timing-function: cubic-bezier(0, 0, 0.58, 1);
    }

    #div5 {
      -webkit-animation-timing-function: cubic-bezier(0.42, 0, 0.58, 1);
    }

    @keyframes mymove {
      from {
        left: 0px;
      }
      to {
        left: 300px;
      }
    }

    @-webkit-keyframes mymove
    /* Safari and Chrome */

    {
      from {
        left: 0px;
      }
      to {
        left: 300px;
      }
    }
  </style>
</head>
<body>

  <p><strong>注意:</strong> animation-timing-function 属性不兼容 Internet Explorer 9 以及更早版本的浏览器.</p>

  <div id="div1">linear</div>
  <div id="div2">ease</div>
  <div id="div3">ease-in</div>
  <div id="div4">ease-out</div>
  <div id="div5">ease-in-out</div>

</body>
</html>
        