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watak

返回值:Array<Element(s)>:first-child

V1.1.4概述

匹配第一个子元素

':first' 只匹配一个元素,而此选择符将为每个父元素匹配一个子元素

示例

描述:

在每个 ul 中查找第一个 li

HTML 代码:
<ul>
  <li>John</li>
  <li>Karl</li>
  <li>Brandon</li>
</ul>
<ul>
  <li>Glen</li>
  <li>Tane</li>
  <li>Ralph</li>
</ul>
jQuery 代码:
$("ul li:first-child")
结果:
[ <li>John</li>, <li>Glen</li> ]
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