 summaryContainer ? summaryContainer.setAttribute('data-display', 'block') : null;
      }

      var items = document.querySelectorAll('#search-menu .dropdown-item');
      var keyCode = e.which || e.keyCode;

      if (!items || !items.length) {
        return null;
      }
      
      if (e.key === 'ArrowDown' || keyCode === 40) {
        if (activeIndex === null) {
          activeIndex = 0;
          items[activeIndex].classList.remove('is-active');
        } else {
          items[activeIndex].classL