event-handler.js

/**
 * Adds a method to the Y.Base prototype to handle events so that when a widget
 * or plugin becomes destroyed all events attached are detached.
 *
 * Requires Y.Lang & Y.Array
 */
YUI.add('event-handler', function(Y) {

    var YArray = Y.Array;

    Y.Base.prototype.eventHandler = {

        add : function(event) {

            this.events = this.events || [];

            if (YLang.isArray(event)) {
                YArray.each(event, function(ev) {
                    this.events.push(ev);
                }, this);
            } else {
                this.events.push(event);
            }

        },

        destroy : function() {

            YArray.each(this.events, function(eh) {
                eh.detach();
            });

        }
    }

});

gistfile2.js

-= To Use Within Widget Or Plugin=-
-=To Add=-
            this.eventHandler.add([
                Y.one('window').on('resize', function, this),
                Y.one('#loginform').on('submit', function, this)
            ]);

-=OR=-

            this.eventHandler.add(
                Y.one('#loginform').on('submit', function, this)
            );

-=To Destroy=-

            this.eventHandler.destroy();