jQuery PubSub (Observer Pattern)

gistfile1.js

(function($) {
  var o = $({});

  $.each({
    trigger: 'publish',
    on: 'subscribe',
    off: 'unsubscribe'
  }, function(key, api) {
    $[api] = function() {
      o[key].apply(o, arguments);
    };
  });
})(jQuery);

/*
$.publish("event.type");
$.subscribe("event.type", callback);
*/