Module Pattern in Javascript

module-pattern.js

/* IIFE - Immediately Invoked Function Execution : 
This function calls itself immediately after declaration, it creates a new scope and creates "privacy".
Return only the part we need, while keeping the other functions private. 
*/ 
(function () {
  // code goes here
})();

// Adding a namespace
var Module = (function () {
  // code goes here
})();

// Creating a private method 
var Module = (function () {
  var privateMethod = function () {
    // do something here
  };
})();

// Returning public methods
var Module = (function () {
  var privateMethod = function () {
    // do something here
  };
  
  return {
    publicMethod: function () {
      // can call privateMethod() here
    }
  };
})();