RequireJS module for `addEventListener` method.

addEvent.js

'use strict';

define([], function()
{
    /**
     * Loops through each event type, attaches the listener, and creates a
     * fallback with `attachEvent`.
     * @param {object}   el         The element on which to attach the listener.
     * @param {array}    type       A array containing the event type(s) to
     *                              listen for.
     * @param {function} listener   The function that runs when the event type
     *                              is called.
     */
    function addEventListener(el, type, listener)
    {
        for (var i = 0, length = type.length; i < length; i++) {
            if (el.addEventListener) {
                el.addEventListener(type[i], listener, false);
            } else {
                el.attachEvent('on' + type[i], listener);
            }
        }
    }

    return {
        /**
         * Public method; call using `addEvent.init(el, type, listener);`
         * @param  {object}   el       The element on which to attach the listener.
         * @param  {string}   type     A string containing the event type(s) to
         *                             listen for. Multiple events should be
         *                             separated by a space. The string gets
         *                             converted to an array by the `split` method.
         * @param  {function} listener The function that runs when the event type
         *                             is called.
         */
        init: function(el, type, listener)
        {
            type = type.split(' ');

            if (typeof el.length === 'undefined' || el.length === 0) {
                addEventListener(el, type, listener);
            } else {
                for (var i = 0, length = el.length; i < length; i++) {
                    addEventListener(el[i], type, listener);
                }
            }
        }
    };
});

init.js

/**
 * Usage
 *
 * Grab an element with `document.querySelector` or `document.querySelectorAll`
 */

'use strict';

define(['addEvent'], function(addEvent)
{
    var selectors = {
        menuButton: document.querySelector('.js-menu-button')
    };

    return {
        init: function()
        {
            addEvent.init(selectors.menuButton, 'click touchstart', function(event)
            {
                // Do something

                event.preventDefault();
            });
        }
    };
});