Async publisher subscriber for YUI3, intern solution cause weird behavior of custom events when fire them globally. Sandbox/playground http://jsbin.com/ibubaq/10/edit, SO http://stackoverflow.com/questions/18158657/yui3-custom-async-events-not-working-on-y-global

async-pubsub.js

YUI.add('async-pubsub', function(Y) {
    'use strict';

    if (!YUI.asyncPubSub) {
        YUI.namespace('asyncPubSub');
        YUI.asyncPubSub = (function() {
            var eventsFired = {}, eventsSubscribed = {};

            function doPublishFor(eventName) {
                var subscribers = eventsSubscribed[eventName],
                    len, it;

                if (subscribers) {
                    len = subscribers.length;
                    for (; --len > -1;) {
                        it = subscribers[len];
                        if (!it.called) {
                            it.callback.call();
                            it.called = true;
                        }
                    }
                }
            }
            return {
                publish: function(eventName, options) {
                    eventsFired[eventName] = options || {};
                    doPublishFor(eventName);
                },
                subscribe: function(eventName, callback) {
                    var slot = {};
                    slot.callback = callback || function() {};
                    slot.called = false;
                    eventsSubscribed[eventName] = eventsSubscribed[eventName] || [];
                    eventsSubscribed[eventName].push(slot);

                    if (eventsFired[eventName]) {
                        doPublishFor(eventName);
                    }
                },
                /**
                 * Cleanup everything, experemental method for testing purposes, use with caution
                 *
                 * @param  {str} eventName
                 */
                detach: function(eventName) {
                    if (eventName) {
                        delete eventsFired[eventName];
                        delete eventsSubscribed[eventName];
                    } else {
                        eventsFired = {};
                        eventsSubscribed = {};
                    }
                }
            };
        })();
    }
    Y.namespace('asyncPubSub');
    Y.asyncPubSub = YUI.asyncPubSub;
}, '1.0.1', {
    requires: []
});