创建对象

//  字面量json

 var student={

     id:10001,

     name:"李四",

     scores:[

         {subject:"html",score:90},

         {subject:"JS",score:90}

     ]

 }

//  function

 function Student(id,name){

     this.id = id;

     this.name = name;

     this.scores = [

         {subject:"html",score:90},

         {subject:"JS",score:90}

     ]

 }

 Student.prototype.sex="女";

 Student.prototype.eat=function(food){

     console.log("吃"+food)

 }

 var stu=new Student(1000,"李四");

 stu.eat("米饭");

 console.log(stu.sex)

//  Object

var stu2=new Object();

stu2.id=1000;

stu2.name="李四";

stu2.scores=[

    {subject:"html",score:90},

    {subject:"JS",score:90}

]

// 链式编程

function Student(id,name){

    this.id = id;

    this.name = name;

    this.scores = [

        {subject:"html",score:90},

        {subject:"JS",score:90}

    ],

    this.eat=function(food){

        console.log("吃"+food)

        return this

    },

    this.sleep=function(){

        console.log("睡")

        return this

    }

}

var stu=new Student(1001,"李四");

stu.eat("螺蛳粉加鸡爪").sleep().eat("螺蛳粉加鸡爪").sleep();

function Student(id,name){

    this.id = id;

    this.name = name;

    this.scores = [

        {subject:"html",score:90},

        {subject:"JS",score:90}

    ],

    this.noeat=function(food){

        console.log("不吃"+food)

        return this

    },

    this.nosleep=function(){

        console.log("不睡")

        return this

    }

}

var stu=new Student(1001,"李四");

stu.noeat("螺蛳粉加鸡爪").nosleep().noeat("螺蛳粉加鸡爪").nosleep();