navbar--show')) {
            navbar.classList.remove('navbar--show');
          }
        }

        if (singleContentsElem) {
          if (singleContentsElem.querySelectorAll(tocLevels).length > 0) {
            singleContentsElem.querySelectorAll(tocLevels).forEach(function (elem) {
              if (toggleTocElem && !toggleTocElem.checked) {
                return null;
              }

              if (notAllowedTitleIds && notAllowedTitleIds.includes(elem.getAttribute('id'))) {
                retur