JavaScript class - Call method when object initialized

Question

I have a class similar to the one below. How do I call my init method when the object is created? I don't want to have to create an instance of my object then call initialize like I do below.

var myObj = new myClass(2, true); myObj.init();  function myClass(v1, v2)  {     // public vars     this.var1 = v1;      // private vars     var2 = v2;      // pub methods     this.init = function() {         // do some stuff             };      // private methods     someMethod = function() {         // do some private stuff     }; } 

Answer 1

NB. Constructor function names should start with a capital letter to distinguish them from ordinary functions, e.g. MyClass instead of myClass.

Either you can call init from your constructor function:

var myObj = new MyClass(2, true);  function MyClass(v1, v2)  {     // ...      // pub methods     this.init = function() {         // do some stuff             };      // ...      this.init(); // <------------ added this } 

Or more simply you could just copy the body of the init function to the end of the constructor function. No need to actually have an init function at all if it's only called once.

Answer 2

There is even more smooth way to do this:

this.init = function(){   // method body }(); 

This will both create method and call it.