jQuery-从div读取所有类 [英] Jquery - Read all Classes from a div

问题描述

我正在尝试通过以下方式从HTML元素读取所有类名称.但这不起作用:

I'm trying to read all class names from HTML element in the following way. But it doesn't work:

HTML

<div id="test" class="fff aaa ccc" >hello world</div>

JS

if ($('#test').attr('class') != '')
{
   // Read classes
    var all_classes = $('#test').attr('class');

    // Output
    $('body').append('Classnames: '+all_classes+' ');

}

示例 http://www.jsfiddle.net/AQgqU/8/

有人可以帮我吗?

推荐答案

您可以这样做:

var classes = $('#test').attr('class').split(' ');

alert(classes[0]); // first class
alert(classes[1]); // second class
alert(classes[2]); // third class

或者您可以使用循环:

for(var i = 0; i < classes.length; i++) {
  alert(classes[i]);
}

更新:

如@KennyTM所建议的那样，使用上述代码，类名周围可能有空格.您可以使用jQuery的$.trim函数删除任何空格.

As suggested by @KennyTM, with above code there was possibility of space coming around a class name. You can use the $.trim function of jQuery to remove any space.

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