Javascript - How to define a Constructor

Question

I have an object written like this:

Object1.prototype = {     isInit: false,     Get : function (){} }  

Now I'd like to add a constructor which takes one parameter. How can I do it?

Answer 1

Class declaration

var User = function(name, age) { // constructor }  User.prototype = {} 

Instance variables (members)

var User = function(name, age) {     this.name = name;     this.age = age; }  User.prototype = {} 

Static variables

var User = function(name, age) {     this.name = name;     this.age = age; }  User.prototype = {     staticVar: 15,     anotherStaticVar: 'text' } 

Here I defined two static variables. Each User instance has access to these two variables. Note, that we can initialize it with value;

Instance functions (methods)

var User = function(name, age) {     this.name = name;     this.age = age; }  User.prototype = {     getName: function() {         return this.name;     },      setName: function(name) {         this.name = name;     } } 

Usage example:

var user = new User('Mike', 29); user.setName('John'); alert(user.getName()); //should be 'John' 

Static functions

var User = function(name, age) {     this.name = name;     this.age = age; }  User.create = function(name, age) {     return new User(name, age); }  User.prototype = {}