POO in JS

MyClass.js

function MyClass (var1, var2) { // Constructor function
  var privateVariable = 'foo'; // Private variable instanced
  this.publicVariable = 'bar'; // Public variable instanced
  this.privilegedMethod = function () {
    return privateVariable; // It's privileged 'cause it can access private variable
  };
}
// Only keept once on memory, available in all instance
MyClass.prototype.publicMethod = function () {
  return this.privilegedMethod();
}
// Static variable, accesed only in MyClass.staticProperty
MyClass.staticProperty = 'foobar';

//...
var myInstance = new MyClass();

//undefined
myInstance.privateVariable;

//'bar'
myInstance.publicVariable;

//'foo'
myInstance.privilegedMethod();

//'foo'
myInstance.publicMethod();

//'foobar', but ...
MyClass.staticProperty;

//undefined
myInstance.staticProperty;