删除以特定字符串开头的所有类 [英] Remove all classes that begin with a certain string

问题描述

我有一个div id =a，可以有多个类附加到它，从几个组。每个组都有一个特定的前缀。在javascript中，我不知道组中的哪个类是在div。我想要能够清除所有类与给定的前缀，然后添加一个新的。如果我想删除所有以bg开头的类，我该怎么做？这样的东西，但实际上是工作：

I have a div with id="a" that may have any number of classes attached to it, from several groups. Each group has a specific prefix. In the javascript, I don't know which class from the group is on the div. I want to be able to clear all classes with a given prefix and then add a new one. If I want to remove all of the classes that begin with "bg", how do I do that? Something like this, but that actually works:

$("#a").removeClass("bg*");

推荐答案

使用jQuery，实际的DOM元素处于索引零，这应该工作

With jQuery, the actual DOM element is at index zero, this should work

$('#a')[0].className = $('#a')[0].className.replace(/\bbg.*?\b/g, '');

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