<html>
<head>
<style>
div
{
width:100px;
height:100px;
background:red;
transition-property:width;
transition-duration:1s;
transition-timing-function:linear;
transition-delay:2s;
/* Safari */
-webkit-transition-property:width;
-webkit-transition-duration:1s;
-webkit-transition-timing-function:linear;
-webkit-transition-delay:2s;
}
div:hover
{
width:200px;
}
</style>
</head>
<body>
<p><b>注意：</b>该实例无法在 Internet Explorer 9 及更早 IE 版本上工作。</p>
<div></div>
<p>鼠标移动到 div 元素上，查看过渡效果。</p>
<p><b>注意：</b> 过渡效果需要等待两秒后才开始。</p>
</body>
</html>