<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="https://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("li").each(function ( index,element){ alert(index); alert(element); alert($(this).text()) });
});
});
</script>
</head>
<body>
<button>输出每个列表项的值</button>
<ul>
<li>
Coffee</li>
<li>
Milk</li>
<li>
Soda</li>
</ul>
</body>
</html>
弹出结果 ：
0
[object HTMLLIElement]
Coffee
1
[object HTMLLIElement]
Milk
2
[object HTMLLIElement]
Soda
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