Sugestão de manipulação de events para a biblioteca https://github.com/brcontainer/jot.js

jotEvent.js

(function (window) {
    "use strict";

    var forEach = Array.prototype.forEach;

    var Event = function (nodeList) {
        this.nodeList = nodeList;
    };

    var proto = Event.prototype;
    
    proto.on = function on(event, callback) {
        return this.apply(function (el) {
            el.addEventListener(event, callback, false);
        });
    };

    proto.off = function off(event, callback) {
        return this.apply(function (el) {
            callback ? el.removeEventListener(event, callback) : el.removeEventListener(event);
        });
    };

    proto.prop = function prop(name, value) {

        var callback = function (el) {

            if (typeof value === 'function') {
                value = value(el[name], el);
            }

            if ([undefined, null, false].indexOf(value) >= 0) {
                el.removeAttribute(name);
            } else {
                el.setAttribute(name, value);
            }
        };

        return this.apply(callback);
    };

    prop.apply = function (callback) {
        forEach.call(this.nodeList, callback);
        return this;
    };
    
    window.JotEvent = Event;
    
})(window);