带有不同尺寸大小关键字的径向渐变 - 在线编辑器

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    #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);
      /* 标准的语法（必须放在最后） */
    }

    #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);
      /* 标准的语法（必须放在最后） */
    }

    #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);
      /* 标准的语法（必须放在最后） */
    }

    #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);
      /* 标准的语法（必须放在最后） */
    }
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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>

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