event delegation in backbone

baseview.js

var Backbone = require('backbone');
var _ = require('underscore');

// original: https://github.com/jashkenas/backbone/blob/master/backbone.js#L1037
var delegateEventSplitter = /^(\S+)\s*(.*)$/;

var BaseView = Backbone.View.extend({
  // original: https://github.com/jashkenas/backbone/blob/master/backbone.js#L1112
  delegateEvents: function(events){
    if (!(events || (events = _.result(this, 'events')))) return this;
    this.undelegateEvents();
    for (var key in events) {
      var method = events[key];
      if (!_.isFunction(method)) method = this[events[key]];
      if (!method) continue;
      var match = key.match(delegateEventSplitter);

      if( match[1] === "such-custom-event" ){
        this.delegate("dragstart", match[2], _.bind(method, this));
        this.delegate("touchstart", match[2], _.bind(method, this));
        this.delegate("MSPointerDown", match[2], _.bind(method, this));
      }
      else{
        this.delegate(match[1], match[2], _.bind(method, this));
      }
    }
    return this; 
  }
})

module.exports = BaseView;

example.js

var BaseView = require("./base");

var MyView = BaseView.extend({
  events: {
    "such-custom-event .doge": "wowSuchMethod"
  },
  wowSuchMethod: function(){
    return "so-return";
  }
});

new MyView();