案例：CSS3案例     状态：可编辑再运行    进入竖版
 运行结果　
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<!DOCTYPE html>
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<html>
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<head>
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<style>
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div
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{
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width:100px;
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height:100px;
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background:yellow;
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transition-property:width;
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transition-duration:1s;
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transition-timing-function:linear;
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transition-delay:2s;
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/* Firefox 4 */
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-moz-transition-property:width;
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-moz-transition-duration:1s;
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-moz-transition-timing-function:linear;
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-moz-transition-delay:2s;
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/* Safari and Chrome */
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-webkit-transition-property:width;
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-webkit-transition-duration:1s;
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-webkit-transition-timing-function:linear;
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-webkit-transition-delay:2s;
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/* Opera */
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-o-transition-property:width;
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-o-transition-duration:1s;
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-o-transition-timing-function:linear;
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-o-transition-delay:2s;
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}
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​
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div:hover
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{
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width:200px;
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}
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</style>
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</head>
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<body>
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​
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<div></div>
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​
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<p>请把鼠标指针放到黄色的 div 元素上，来查看过渡效果。</p>
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​
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<p><b>注释：</b>本例在 Internet Explorer 中无效。</p>
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​
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<p><b>注释：</b>这个过渡效果会在开始之前等待两秒。</p>
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​
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</body>
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</html>