为了更好地理解不同的函数值：这里有五个不同的div元素，用5个不同的 - 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;
      transition: width 2s;
      -webkit-transition: width 2s;
      /* Safari */
    }

    #div1 {
      transition-timing-function: linear;
    }

    #div2 {
      transition-timing-function: ease;
    }

    #div3 {
      transition-timing-function: ease-in;
    }

    #div4 {
      transition-timing-function: ease-out;
    }

    #div5 {
      transition-timing-function: ease-in-out;
    }
    /* Safari */

    #div1 {
      -webkit-transition-timing-function: linear;
    }

    #div2 {
      -webkit-transition-timing-function: ease;
    }

    #div3 {
      -webkit-transition-timing-function: ease-in;
    }

    #div4 {
      -webkit-transition-timing-function: ease-out;
    }

    #div5 {
      -webkit-transition-timing-function: ease-in-out;
    }

    div:hover {
      width: 300px;
    }
  </style>
</head>
<body>

  <p><b>注意:</b> 该属性不兼容 IE 9 以及更早版本的浏览器</p>

  <div id="div1" style="top:100px">linear</div>
  <div id="div2" style="top:150px">ease</div>
  <div id="div3" style="top:200px">ease-in</div>
  <div id="div4" style="top:250px">ease-out</div>
  <div id="div5" style="top:300px">ease-in-out</div>

  <p>将鼠标移动至块上查看过渡动画效果.</p>

</body>
</html>
        