SOURCE

//递归深拷贝
//引用类型数据要深拷贝，包括Obj，Array，Date,RegExp，Error
let obj1 = {age:1,name:{age:18,name :'obj'}}
let obj2 = Object.assign({},obj1)
obj2.age = 3;
console.log(obj1)
console.log(obj2)