Added close menu option for codrops/SidebarTransitions. Just add closeMenu as the ID to an item in your st-menu container (in your menu)

sidebarEffects.js

/**
 * sidebarEffects.js v1.0.0
 * http://www.codrops.com
 *
 * Licensed under the MIT license.
 * http://www.opensource.org/licenses/mit-license.php
 * 
 * Copyright 2013, Codrops
 * http://www.codrops.com
 */
var SidebarMenuEffects = (function() {

    function hasParentClass(e, classname) {
        if (e === document) return false;
        if (classie.has(e, classname)) {
            return true;
        }
        return e.parentNode && hasParentClass(e.parentNode, classname);
    }

    // http://coveroverflow.com/a/11381730/989439
    function mobilecheck() {
        var check = false;
        (function(a) {
            if (/(android|ipad|playbook|silk|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4))) check = true
        })(navigator.userAgent || navigator.vendor || window.opera);
        return check;
    }

    function init() {

        var container = document.getElementById('st-container'),
            closeMenu = document.getElementById('closeMenu'),
            buttons = Array.prototype.slice.call(document.querySelectorAll('.st-trigger-effect')),
            // Event type (if mobile use touch events)
            eventtype = mobilecheck() ? 'touchstart' : 'click',
            resetMenu = function() {
                classie.remove(container, 'st-menu-open');
            },
            bodyClickFn = function(evt) {
                if (!hasParentClass(evt.target, 'st-menu')) {
                    resetMenu();
                    document.removeEventListener(eventtype, bodyClickFn);
                }
            },
            closeMenuClickFn = function(evt) {
                resetMenu();
                document.removeEventListener(eventtype, closeMenuClickFn);
            }

        buttons.forEach(function(el, i) {
            var effect = el.getAttribute('data-effect');

            el.addEventListener(eventtype, function(ev) {
                ev.stopPropagation();
                ev.preventDefault();
                container.className = 'st-container'; // clear
                classie.add(container, effect);
                setTimeout(function() {
                    classie.add(container, 'st-menu-open');
                }, 25);
                document.addEventListener(eventtype, bodyClickFn);
                closeMenu.addEventListener(eventtype, closeMenuClickFn);
            });
        });

    }

    init();

})();

After some hours I got a solution to close the sidebar with the same button.
I changed
classie.addClass(container, 'st-menu-open');
to
classie.toggleClass(container, 'st-menu-open');

With no effect. Then I changed

container.className = 'st-container';
to
container.id = 'st-container';

Now it works! I can open and close with the same button.
(I made a burger icon)

`buttons.forEach(function(el, i) {
var effect = el.getAttribute('data-effect');

        el.addEventListener(eventtype, function(ev) {
            ev.stopPropagation();
            ev.preventDefault();
            container.id = 'st-container'; // ORIGINAL:  container.className = 'st-container';
            classie.add(container, effect);
            setTimeout(function() {
                classie.toggleClass(container, 'st-menu-open'); // FIX: Vorher: addClass
            }, 25);
            document.addEventListener(eventtype, bodyClickFn);
            //closeMenu.addEventListener(eventtype, closeMenuClickFn);
        });
    });`