Several ways that JavaScript creates objects

1. Simple object creation using a singleton pattern of {} or JS

 var  Cat = {}; // json format  Cat.name= "Kity"; //  add a property and assign a value  Cat.age=2 =function   () {Console.log (  "Hello" +cat.name+ ", this year" +cat["Age"]+ "); //  You can use "." To access the property, or you can use HashMap to access the   //  

Single-instance objects:
var person={             name:' Zhangsan ',             eat:function() {                Console.log ( "Chi")              }           };p erson.eat (); Call

2. Use function (functions) to simulate class (no parameter constructor)

2.1 Create an object that is equivalent to an instance of the new class

function Person () {} var personone=New person (); // define a function that, if there is a new keyword to "instantiate", then the function can be considered a class personone.name= "Dylan";p ersonone.hobby= " Coding ";p ersonone.work=function() {alert (Personone.name+" is coding now ... ");} Personone.work ();

2.2 can be implemented using a parametric constructor, which makes the definition more convenient and more extensible (recommended)

functionPet (name,age,hobby) { This. name=name;//This scope: current Object    This. age=Age ;  This. hobby=Hobby;  This. eat=function() {alert ("My Name" + This. name+ ", I like" + This. hobby+ ", also a foodie"); }}varMaidou =NewPet ("Eat", 5, "sleep");//Instantiate/Create Objectmaidou.eat ();//calling the Eat method (function)

3. Use Factory mode to create (Object keyword)

var wcdog =new  Object (); Wcdog.name= "Wang Choi"; wcdog.age=3; wcdog.work= function () {   alert ("I Am" +wcdog.name+ ", Wang Woo ...");} wcdog.work ();

4. Prototype keywords by using prototype objects

function Dog () {  } Dog.prototype.name= "Wang Choi"; Dog.prototype.eat=function() {alert (this. name+ "is a foodie"var Wangcai =new  Dog (); Wangcai.eat ();

5. Mixed mode (prototypes and constructors)

function Car (name,price) {  this. name=name;    this. price= price;} Car.prototype.sell=function() {   alert ("I am" +this. name+ ", I sell now" + This . price+ "million Yuan");  } var camry =new Car ("Camry", 27

6. Mode of dynamic prototyping (can be seen as a special case of mixed mode)

function Car (name,price) {  this. name=name;    this. price= price;    if (typeof car.sell== "undefined") {   Car.prototype.sell=function() {    Alert ("I am" +this. name+ ", I sell now" +this. price+ "Million");   } Car.sell=true;}  } var camry =new Car ("Camry"); Camry.sell ();

Several ways that JavaScript creates objects