js对象的深度克隆

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 
 4 <head>
 5     <meta charset="UTF-8">
 6     <title>js对象的深度克隆</title>
 7 </head>
 8 
 9 <body>
10     <script type="text/javascript">
11     var cloneObj = function(obj) {
12         var str, newobj = obj.constructor === Array ? [] : {};
13         if (typeof obj !== 'object') {
14             return;
15         } else if (window.JSON) {
16             str = JSON.stringify(obj), //系列化对象
17             newobj = JSON.parse(str); //还原
18         } else {
19             for (var i in obj) {
20                 newobj[i] = typeof obj[i] === 'object' ?
21                 cloneObj(obj[i]) : obj[i];
22             }
23         }
24         return newobj;
25     };
26     </script>
27 </body>
28 
29 </html>