JS Object-oriented-create object

Factory mode

Factory mode returns the object (factory) by creating an object (raw material) in the function, and then by adding properties and methods to the object (machining).

1. Factory mode function Createperson (name,age,job) {//1. raw material var o = new Object ();//2. Processing O.name = Name;o.age = Age;o.job = Job;o. Sayname = function () {alert (this.name);};/ /3. Factory return o;} var yoomin = Createperson (' yoomin ', +, ' Programmer ');  Call, no new

Constructor mode

The constructor returns an object when new is added by adding properties and methods to this, and the constructor itself has no return value.

2. constructor mode function person (name,age,job) {this.name = Name;this.age = Age;this.job = Job;this.sayage = function () {alert (t his.age);}} var jay = new Person (' Jay ', ' singer ');  Call

Combination of constructor mode and prototype mode

Use constructors to define properties and prototype methods and shared variables:

Constructor Definition Properties:

function Person (name,age,job) {//constructor pattern defines instance properties THIS.name = Name;this.age = Age;this.job = Job;}

How to define a prototype method:

Person.prototype = {//prototype mode definition method and Shared properties Constructor:person,  //rewrite prototype changed constructor, fix back Sayname:function () {alert ( THIS.name);},sayjob:function () {alert (this.job);}}

Note: The literal definition of the prototype will change the prototype constructor point and need to be corrected.

To create an object:

var Kelly = new Person (' Kelly ', ' singer ');  Call Kelly.sayname ();  Kelly

　　

JS Object-oriented-create object