https://www.groovescope.com/js/static-nav.js

1(function () {
2  var nav = document.querySelector('.static-nav');
3  if (!nav) return;
4  var button = nav.querySelector('.static-menu-button');
5  var menu = nav.querySelector('.nav-links');
6  if (!button || !menu) return;
7
8  function close() {
9    button.setAttribute('aria-expanded', 'false');
10  }
11
12  button.addEventListener('click', function () {
13    button.setAttribute('aria-expanded', String(button.getAttribute('aria-expanded') !== 'true'));
14  });
15  document.addEventListener('keydown', function (event) {
16    if (event.key === 'Escape' && button.getAttribute('aria-expanded') === 'true') {
17      close();
18      button.focus();
19    }
20  });
21  document.addEventListener('click', function (event) {
22    if (!nav.contains(event.target)) close();
23  });
24  menu.addEventListener('click', function (event) {
25    if (event.target.closest('a')) close();
26  });
27  window.matchMedia('(max-width: 767px)').addEventListener('change', close);
28})();