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 = {
    name: 'abc',
    age: 123,
    card: ['visa', 'master'],
    wife: {
        name: "bcd",
        son: {
            name: 'aaa'
        }
    }
}
var obj1 = {
    name: obj.name,
    age: 123,
    card: [obj.card[0], obj.card[1]],
    wife: {
        name : obj.wife.name,
        son: {
            name : obj.wife.son.name
        }
    }
}
function deepClone(target, origin) {
    var target = target || {},
        toStr = Object.prototype.toString,
        arrStr = '[object Array]';
    for (var prop in origin) {
        if (origin.hasOwnProperty(prop)) {
            if (origin[prop] !== "null" && typeof (origin[prop]) == 'object') {
              // if (toStr.call(origin[prop]) == arrStr) {
              //     target[prop] = [];
              // } else {
              //     target[prop] = {};
              // }
                target[prop] = ((toStr.call(origin[prop]) == arrStr)?[]:{})
                deepClone(target[prop], origin[prop])
            } else {
                target[prop] = origin[prop]
            }
        }
    }
    return target;
}
deepClone(obj1, obj)