开源教程在线编辑器

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<title>开源教程(ossoft.cn)</title> 
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#grad1 {
  height: 150px;
  width: 150px;
  background-color: red; /* 浏览器不支持的时候显示 */
  background-image: radial-gradient(closest-side at 60% 55%, red, yellow, black); 
}

#grad2 {
  height: 150px;
  width: 150px;
  background-color: red; /* 浏览器不支持的时候显示 */
  background-image: radial-gradient(farthest-side at 60% 55%, red, yellow, black); 
}

#grad3 {
  height: 150px;
  width: 150px;
  background-color: red; /* 浏览器不支持的时候显示 */
  background-image: radial-gradient(closest-corner at 60% 55%, red, yellow, black);
}

#grad4 {
  height: 150px;
  width: 150px;
  background-color: red; /* 浏览器不支持的时候显示 */
  background-image: radial-gradient(farthest-corner at 60% 55%, red, yellow, black); 
}
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<h3>径向渐变 - 不同尺寸大小关键字的使用</h3>

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

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

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

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

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

</body>
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