Singleton Pattern (Config.js)

singletonPattern-Config.js

// models/Config.js
module.exports = (function () {
   return function () {
      var config = {
         urls : {
            tabs : {
               address : '/#address',
               payment : '/#payment'
            } 
         },
         messages : {
            errors : {
               no_address_selected : 'Please, select an address to go next',
               no_cards_used : 'You need to choose a credit card to pay',
               default : 'An error occured. Please try again later'
            }
         }
      }

      var getConfig = function () {
         return config;
      }

      return {
         getConfig : getConfig
      }
   }
})();