11.4创建对象 js

//字变量  json

//常用于数据解析

 var student={

     id:10001,

     name="张三"

     scores: [

         {subject:"html",score: 90 },

         {subject:"js",score: 90 }

     ]

 }

// function

//推荐   常用方式

 function student(id, name) {

     this.id = id;

      this.name = name

      this.scores = [

          {subject: "html", score: 90},

          {subject: "js", score: 90}

      ]

 }

 //扩展

 student.prototype.sex="男"

 student.prototype.eat = function (food) {

    console.log("吃" + food)

 }

 var stu = new student(1000,"张三");

 stu.eat("米饭");

 console.log(stu.sex)

 //  object

 // 缺点：代码重复率高

 //好处：可以随机扩展

var stu2 = new Object();

 stu2.id = 1000;

 stu2.name = "张三";

 stu2.scores = [

       {subject: "html", score: 90},

        {subject: "js", score: 90}

 ]

 function student(id, name) {

    this.id = id;

     this.name = name

     this.eat = function (food) {

        console.log("吃" + food)

        return this

     },

     this.sleep = function(){

         console.log("睡")

         return this

     }

}

var stu = new student(1001,"张三");

//方法一

// stu.eat("苦瓜");

// stu.sleep();

//链式编程

//方法二

stu.eat("苦瓜").sleep().eat("苦瓜").sleep().eat("苦瓜").sleep().eat("苦瓜").sleep().eat("苦瓜").sleep()