1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="utf-8">
5 <script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
6 <script type="text/javascript">
7 $(function(){
8 $.each([1,2,3],function(index,value){
9 alert(index+"=="+value);
10 })
11 })
12 </script>
13 </head>
14
15 <body>
16
17 </body>
18 </html>jquery each()函数用于遍历指定的对象和数组。
语法
$.each(object,callback)遍历对象
1 <script type="text/javascript">
2 $(function(){
3 var obj = {
4 "site":"你我他学习吧",
5 "author":"张学亮"
6 }
7 $.each(obj,function(key,value){
8 alert(key + "==" + value);
9 })
10 })
11 </script>遍历数组
1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="utf-8">
5 <script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
6 <script type="text/javascript">
7 $(function(){
8 var arr = ["one","two","three","four","five"];
9 var obj = {one:1,two:2,three:3,four:4,five:5};
10 $.each(arr,function(i,val){
11 $("#"+val).text("我的是 "+val+".");
12 //在three之后停止运行
13 //return (val !== "three");
14 });
15 $.each(obj,function(i,val){
16 $("#"+i).append(document.createTextNode(" - "+val));
17 })
18 })
19 </script>
20 </head>
21
22 <body>
23 <div id="one"></div>
24 <div id="two"></div>
25 <div id="three"></div>
26 <div id="four"></div>
27 <div id="five"></div>
28 </body>
29 </html>遍历一个元素
1 <script type="text/javascript">
2 $(function(){
3 var obj = {name:"John",lang:"Java"};
4
5 $.each(obj,function(key,value){
6 alert("关键词："+key+"==值："+value);
7 })
8 })
9 </script>
