A Pub / Sub Sample

pubsub

var events = (function(){
  var topics = {};

  return {
    subscribe: function(topic, listener) {
      // Create the topic's object if not yet created
      if(!topics[topic]) topics[topic] = { queue: [] };

      // Add the listener to queue
      var index = topics[topic].queue.push(listener);

      // Provide handle back for removal of topic
      return (function(index) {
        return {
          remove: function() {
            delete topics[index];
          }
        }
      })(index);
    },
    publish: function(topic, info) {
      // If the topic doesn't exist, or there's no listeners in queue, just leave
      if(!topics[topic] || !topics[topic].queue.length) return;

      // Cycle through topics queue, fire!
      var items = topics[topic].queue;
      for(var x = 0; x < items.length; x++) {
        items[x](info || {});
      }
    }
  };
})();

/*initialize an event subscription*/
var testSub = events.subscribe('/page/load', function(obj) {
   console.log('test sub callback after /page/load occurs.');
});

/*publish an event*/
events.publish('/page/load', {
	url: '/some/url/path' // any argument
});