pubsub-pattern.js

(function () {
    'use strict';

	var pubsub = (function pubsub () {
		var subscribers = {};

		function EventObject() {}
		EventObject.prototype = {};
		EventObject.prototype.constructor = EventObject;

		function subscribe(event, callback) {
			if(!subscribers[event]) {
				var subscriberArray = [callback];
				subscribers[event] = subscriberArray;
			} else {
				subscribers.push(callback);
			}
		}

		function publish(event, data) {
			var eventObject = new EventObject();
			eventObject.type = event;

			if(data) {
				eventObject.data = data;
			}

			if (subscribers[event]) {
				subscribers[event].forEach(function (callback) {
					callback(eventObject);
				});
			}
		}

		return {
			pub: publish,
			sub: subscribe
		}
	}());

	pubsub.sub('someCustomEvent', function(e) {
		console.log('someCustomEvent was triggered! ', e.data.customData);
	});	

	pubsub.pub('someCustomEvent', {
		customData: 'customData!'
	});
}());