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源代碼:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>Wfuyu教程(wfuyu.com)</title> 
<style>
#grad1 {
    height: 150px;
    width: 150px;
    background: -webkit-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Safari 5.1 - 6.0 */
    background: -o-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Opera 11.6 - 12.0 */
    background: -moz-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Firefox 3.6 - 15 */
    background: radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* 標準的語法（必須放在最后） */
}

#grad2 {
    height: 150px;
    width: 150px;
    background: -webkit-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Safari 5.1 - 6.0 */
    background: -o-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Opera 11.6 - 12.0 */
    background: -moz-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Firefox 3.6 - 15 */
    background: radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* 標準的語法（必須放在最后） */
}

#grad3 {
    height: 150px;
    width: 150px;
    background: -webkit-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Safari 5.1 - 6.0 */
    background: -o-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Opera 11.6 - 12.0 */
    background: -moz-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Firefox 3.6 - 15 */
    background: radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* 標準的語法（必須放在最后） */
}

#grad4 {
    height: 150px;
    width: 150px;
    background: -webkit-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Safari 5.1 - 6.0 */
    background: -o-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Opera 11.6 - 12.0 */
    background: -moz-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Firefox 3.6 - 15 */
    background: radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* 標準的語法（必須放在最后） */
}
</style>
</head>
<body>

<h3>徑向漸變 - 不同尺寸大小關鍵字的使用</h3>

<p><strong>closest-side：</strong></p>
<div   class="mwsqua40mo"   id="grad1"></div>

<p><strong>farthest-side：</strong></p>
<div   class="mwsqua40mo"   id="grad2"></div>

<p><strong>closest-corner：</strong></p>
<div   class="mwsqua40mo"   id="grad3"></div>

<p><strong>farthest-corner（默認）：</strong></p>
<div   class="mwsqua40mo"   id="grad4"></div>

<p><strong>注意：</strong> Internet Explorer 9 及之前的版本不支持漸變。</p>

</body>
</html>

運行結果：

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