更改跨度的类 [英] changing class of a span

问题描述

我有两个div，如下所示，我想从div top2更改span s1的类名称.但是以下代码不起作用.我该怎么办?

I have two divs as follows and I want to change the class name of span s1 from div top2. But the following code is not working. How can I do that?

$('#top1 #s1 span.myclass-old').toggleClass('myclass-new');

<div id="top1">
   <span id="s1" class="myclass">a</span>
   <span id="s2" class="myclass">b</span>
</div>

<div id="top2">
   <span id="s1" class="myclass-old">a</span>
   <span id="s2" class="myclass">b</span>
</div>

推荐答案

如果要将类别从旧类"更改为新类"，请尝试以下代码:

If you wanna change your class from 'class-old' to 'class-new' try this code:

$('#top1 #s1.myclass-old').removeClass('myclass-old').addClass('myclass-new');

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