js克隆

 //遍历对象  for(var prop in obj)
 //1.判断是不是原始值    typeof() object instaceof toString constructor
//2.判断是数组还是对象
//3.建立相应的数组或对象
 //递归

 1 var obj = {
 2     name: ‘abc‘,
 3     age: 123,
 4     card: [‘visa‘, ‘master‘],
 5     wife: {
 6         name: "bcd",
 7         son: {
 8             name: ‘aaa‘
 9         }
10     }
11 }
12 var obj1 = {
13     name: obj.name,
14     age: 123,
15     card: [obj.card[0], obj.card[1]],
16     wife: {
17         name : obj.wife.name,
18         son: {
19             name : obj.wife.son.name
20         }
21     }
22 }
28 function deepClone(target, origin) {
29     var target = target || {},
30         toStr = Object.prototype.toString,
31         arrStr = ‘[object Array]‘;
32     for (var prop in origin) {
33         if (origin.hasOwnProperty(prop)) {
34             if (origin[prop] !== "null" && typeof (origin[prop]) == ‘object‘) {
35               // if (toStr.call(origin[prop]) == arrStr) {
36               //     target[prop] = [];
37               // } else {
38               //     target[prop] = {};
39               // }
40                 target[prop] = ((toStr.call(origin[prop]) == arrStr)?[]:{})
41                 deepClone(target[prop], origin[prop])
42             } else {
43                 target[prop] = origin[prop]
44             }
45         }
46     }
47     return target;
48 }
49 deepClone(obj1, obj)