JavaScript面向对象，除了原始数据类型，都是地址引用

javascript 数据类型

原始类型：数字、字符串、布尔、null、undefined 传值

对象类型：对象、数组、函数 传址 引用

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var oldobj = {
    name: "zxc",sex: "male",age: "24",address: "beijing"
};
var oneObj = oldobj;

var twoObj = oldobj;

twoObj.name="heping";

console.log(oneObj,"
");

console.log(twoObj,"
");
{"heping","male","24","beijing"}

{"heping","beijing"}

var oldobj = {

name: "zxc",address: "beijing"

};
var oneObj = oldobj;

var twoObj = {};

for(item in oldobj) {

twoObj[item] = oldobj[item];

}

twoObj.name="heping";

console.log(oneObj,"
");
{"zxc","beijing"}

angular代码
this.oldobj = {

name: "zhang.x.c",age: "25",address: "beijing"

};
this.oneObj = this.oldobj;

this.twoObj = {};

for(let item in this.oldobj) {

this.twoObj[item] = this.oldobj[item];

}

this.twoObj.name = "heping";

console.log(this.oneObj,"
");

console.log(this.twoObj,"
");