Simple Pub Sub

pubsub.js

var events = {}

function publish(e, message) {
  var subscribers = events[e];
  subscribers.map(function(sub) {
    sub(message);
  });
}

function on(e, cb) {
  if (e in events) {
    return events[e].push(cb); 
  }
  events[e] = [cb];
}

module.exports.publish = publish;
module.exports.on = on;