See https://github.com/jrf0110/backbone-events

backbone-events.js

(function(){
  var BackboneEvents = {
    on: function(events, callback, context) {
      var ev;
      events = events.split(/\s+/);
      var calls = this._callbacks || (this._callbacks = {});
      while (ev = events.shift()) {
        var list  = calls[ev] || (calls[ev] = {});
        var tail = list.tail || (list.tail = list.next = {});
        tail.callback = callback;
        tail.context = context;
        list.tail = tail.next = {};
      }
      return this;
    },
    off: function(events, callback, context) {
      var ev, calls, node;
      if (!events) {
        delete this._callbacks;
      } else if (calls = this._callbacks) {
        events = events.split(/\s+/);
        while (ev = events.shift()) {
          node = calls[ev];
          delete calls[ev];
          if (!callback || !node) continue;
          // Create a new list, omitting the indicated event/context pairs.
          while ((node = node.next) && node.next) {
            if (node.callback === callback &&
              (!context || node.context === context)) continue;
            this.on(ev, node.callback, node.context);
          }
        }
      }
      return this;
    },
    trigger: function(events) {
      var event, node, calls, tail, args, all, rest;
      if (!(calls = this._callbacks)) return this;
      all = calls['all'];
      (events = events.split(/\s+/)).push(null);
      // Save references to the current heads & tails.
      while (event = events.shift()) {
        if (all) events.push({next: all.next, tail: all.tail, event: event});
        if (!(node = calls[event])) continue;
        events.push({next: node.next, tail: node.tail});
      }
      // Traverse each list, stopping when the saved tail is reached.
      rest = Array.prototype.slice.call(arguments, 1);
      while (node = events.pop()) {
        tail = node.tail;
        args = node.event ? [node.event].concat(rest) : rest;
        while ((node = node.next) !== tail) {
          node.callback.apply(node.context || this, args);
        }
      }
      return this;
    }
  };
  if (define) define(function(){ return BackboneEvents; });
  else if (module) module.exports = BackboneEvents;
  else window.BackeboneEvents = BackboneEvents;
})();