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本文档使用
php.cn手册 发布
文字
返回值:Array<Element(s)>
:only-child
V1.1.4概述
如果某个元素是父元素中唯一的子元素，那将会被匹配
如果父元素中含有其他元素，那将不会被匹配。（注：这里的其他元素并不包含文本节点，如：<p><img/>图片</p>，用$('p img:only-child')是可以匹配，感谢：nwujiajie 指正）
示例
描述:
在 ul 中查找是唯一子元素的 li
HTML 代码:
<ul> <li>John</li> <li>Karl</li> <li>Brandon</li> </ul> <ul> <li>Glen</li> </ul>
jQuery 代码:
$("ul li:only-child")结果:
[ <li>Glen</li> ]