检查元素是否具有类的最佳方式是什么？ [英] What is the best way to check if element has a class?

问题描述

如果元素有多个类，那么它将不匹配常规属性值检查，所以我正在寻找最好的方法来检查是否该对象在该元素的className属性中具有特定的类。

If the element has multiple classes then it will not match with the regular property value checking, so I'm looking for the best way to check if the object has a particular class in the element's className property.

// element's classname is 'hello world helloworld'
var element = document.getElementById('element');

// this obviously fails
if(element.className == 'hello'){ ... }

// this is not good if the className is just 'helloworld' because it will match
if(element.className.indexOf('hello') != -1){ ... }  

那么最好的方法是什么？

So what would be the best way to do this?

只是纯粹的javascript请

推荐答案

function hasClass( elem, klass ) {
     return (" " + elem.className + " " ).indexOf( " "+klass+" " ) > -1;
}

这篇关于检查元素是否具有类的最佳方式是什么？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！