Jquery中next和children的区别

最新推荐文章于 2025-12-04 17:39:28 发布

最新推荐文章于 2025-12-04 17:39:28 发布 · 116 阅读

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#javascript #ViewUI

本文详细解释了在jQuery中如何通过li元素找到其子节点ul元素，以及如何使用hover方法实现鼠标悬停效果。通过实例演示了如何通过next和children方法的不同作用来获取不同级别的节点。

next找的是同级的节点，children找的是子节点

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<wbr><wbr><wbr><wbr><wbr><wbr><wbr> <ul><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><strong><li class="first"><</strong>a href="#">这是一级菜单1</a><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><strong><ul><br></strong><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <li class="second"><a href="#">这是二级菜单11</a></li><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <li class="second"><a href="#">这是二级菜单12</a></li><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><strong></ul><br></strong><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </li><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><strong><li class="first"><</strong>a href="#">这是一级菜单2</a><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><strong><wbr> <ul><br></wbr></strong><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <li class="second"><a href="#">这是二级菜单21</a></li><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <li class="second"><a href="#">这是二级菜单22</a></li><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><strong></ul><br></strong><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </li><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </ul><br><wbr><wbr><wbr> </div></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

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jquery代码如下

$(document).ready(function(){
<wbr><wbr><wbr> $("li.first").hover(function(){<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> $(this).<strong>children</strong>("ul").slideDown();<wbr><wbr> 找到的是如图表示标黑的ul节点<br><wbr><wbr><wbr> },<br><wbr><wbr><wbr> function(){<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> $(this).<strong>children</strong>("ul").slideUp();<br><wbr><wbr><wbr> });<br> });</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

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如果改成$(this).next("ul")，则找不到，因为没有和它同一级的ul节点！

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