return 'imoocClass'是因为什么？
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<title></title>
<style>
.left,
.right {
width: 300px;
height: 120px;
}
.left div,
.right div {
width: 100px;
height: 90px;
padding: 5px;
margin: 5px;
float: left;
border: 1px solid #ccc;
}
.newClass{
background: #bbffaa;
}
.imoocClass{
background: red;
}
</style>
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
</head>
<body>
<h2>.removeClass()方法</h2>
<div class="left">
<div class="aaron newClass">
<p>newClass</p>
</div>
<div class="aaron newClass">
<p>newClass</p>
</div>
</div>
<div class="right">
<div class="aa bb imoocClass">
<article>
<p>imoocClass</p>
</article>
</div>
<div>
<article>
<p>imoocClass</p>
</article>
</div>
</div>
<script type="text/javascript">
//class=left下div元素删除newClass样式
$('.left div').removeClass('newClass')
</script>
<script type="text/javascript">
//.removeClass() 方法允许我们指定一个函数作为参数，返回将要被删除的样式
$('.right > div:first').removeClass(function(index,className){
//className = aa bb imoocClass
// alert(className)
//把div的className赋给下一个兄弟元素div上作为它的class
$(this).next().addClass(className)
//删除自己本身的imoocClass
return 'imoocClass'
})
</script>
</body>
</html>
