tener("DOMContentLoaded", function () {
    // sidenav
    var sideButton = document.getElementById("sidenavButton");
    var sidenav = document.getElementById("sidenav");
    if (sideButton && sidenav) {
      sideButton.addEventListener("click", function (e) {
        sidenav
          .classList
          .toggle("hidden");
        e.stopPropagation();
      });
      document.addEventListener("click", function (e) {
        // if the clicked element isn't the list, close the list
        if (!sidenav.cl