Javascript如何复制对象

//深复制对象方法   

var cloneObj = function (obj) { 

    var newObj = {}; 

    if (obj instanceof Array) { 

        newObj = []; 

    } 

    for (var key in obj) { 

        var val = obj[key]; 

        //newObj[key] = typeof val === 'object' ? arguments.callee(val) : val; //arguments.callee 在哪一个函数中运行，它就代表哪个函数, 一般用在匿名函数中。 

        newObj[key] = typeof val === 'object' ? cloneObj(val): val; 

    } 

    return newObj; 

}; 

//测试   

var obj = {a:function(){console.log(this.b.c)},b:{c:1}},//设置一个对象 

newObj = cloneObj(obj);//复制对象 

newObj.b.c=2;//给新对象赋新值 

obj.a();//1，不受影响 

newObj.a();//2

var obj = {a:1,b:2} 

var newObj = JSON.parse(JSON.stringify(obj)); 

newObj.a=3; 

console.log(obj); 

console.log(newObj);

var a=[1,2,3]; 

var b=a; 

var c=[].concat(a); 

a.push(4); 

console.log(b); 

console.log(c);

var obj = {

  name: 'FungLeo',

  sex: 'man',

  old: '18'}var { ...obj2 } = obj

obj.old = '22'console.log(obj)

console.log(obj2)

var arr = [1,2,3,4,5]var [ ...arr2 ] = arr

arr[2] = 5console.log(arr)

console.log(arr2)