Add listener to dispatch events

eventListener.js

var utitlity = (function(){
  'use strict';
  var observerList = [];
  
  var observe = function (eventName, eventMethod) {
    observerList[eventName] = eventMethod;
  };
  
  var dispatch = function (eventName, eventParams){
    eventParams = eventParams || '';
    if (observerList.indexOf(eventName)) {
        if (typeof observerList[eventName] === 'function') {
            observerList[eventName].call(this, eventParams);
        }
    }
  };

  var clearObserverList = function () {
    observerList = [];    
  };

  var getObserverList = function () {
     return observerList; 
  };
  
  return {
    observe		: observe,
    dispatch	: dispatch,
    clearObserverList: clearObserverList,
    getObserverList: getObserverList
  };
  
})();

utitlity.observe('addElement', function (count) {
    console.log('Called >>> ', count + 1);
});