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テキスト

返回值:jQueryinsertBefore(content)

概述

把所有匹配的元素插入到另一个、指定的元素元素集合的前面。

实际上,使用这个方法是颠倒了常规的$(A).before(B)的操作,即不是把B插入到A前面,而是把A插入到B前面。

在jQuery 1.3.2中,appendTo, prependTo, insertBefore, insertAfter, 和 replaceAll这个几个方法成为一个破坏性操作,要选择先前选中的元素,需要使用end()方法,参见 appendTo 方法的例二。

参数

contentStringV1.0

用于匹配元素的jQuery表达式

示例

描述:

把所有段落插入到一个元素之前。与 $("#foo").before("p")相同。

HTML 代码:
<div id="foo">Hello</div><p>I would like to say: </p>
jQuery 代码:
$("p").insertBefore("#foo");
结果:
<p>I would like to say: </p><div id="foo">Hello</div>
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