https://wfts.su/js/slideout-settings.js?4

1window.onload = function () {
2    var slideout = new Slideout({
3        'panel': document.getElementById('panel'),
4        'menu': document.getElementById('menu'),
5        'duration': 1,
6        'side': 'right'
7    });
8
9    try {
10        document.querySelector('.js-slideout-toggle').addEventListener('click', function () {
11            slideout.toggle();
12        });
13    } catch (TypeError) {
14        // do nothing
15    }
16
17    try {
18        document.querySelector('.menu').addEventListener('click', function (eve) {
19            if (eve.target.nodeName === 'A') {
20                slideout.close();
21            }
22        });
23    } catch (TypeError) {
24        // do nothing
25    }
26};