// ES5 example
var module = (function() {
  'use strict';

  var selectors = {
    // object literal would contain selectors
    mySelector: '.banner'
  };

  var publicMethod = function() {
    console.log("I'm a public function you should see me in console, i can be called by typing module.publicMethod()");
  };

  var privateMethod = function() {
    console.log("I'm a private function you should see me in console but cannot access me via a function");
  };

  var init = function() {
    privateMethod();
  };

  return {
    init: init,
    publicMethod: publicMethod
  };
})();

module.init(); // I'm a private function you should see me in console but cannot access me via a function
module.publicMethod() // I'm a public function you should see me in console, i can be called by typing module.publicMethod()
module.privateMethod() // module.privateMethod is not a function