static-class-in-js.js

/**
 * Static class - this new MyClass will create scope but with same objects and class which are static, which tells that tells being as 
 * a static class, it can be told as MyClass will not be `this` giving its reference to MyClass for all instances
 * and can shared
 */
function MyClass()
{
  function add(num1, num2) { return (num1+num2); }
  function sub(num1, num2) { return (num1-num2); }

  MyClass.add = add;
  MyClass.subtract = sub;

  return MyClass;
}