gistfile1.js

module.exports = Eventable;

/**
 * Provide a mixin-able interface for registering DOM events
 */
function Eventable()
{
}

/**
 * Register a DOM event on an element and set up callback
 */
Eventable.prototype.registerEvent = function(event, callback)
{
  var eventOnElement = event.split(/ (.+)?/);
  var eventType = 'on' + eventOnElement[0];
  var el = eventOnElement[1];

  var _this = this;
  this.el.querySelector(el)[eventType] = function(e) {
    callback.call(_this, e);
  };
};