Toggle dropdown on keydown

gistfile1.html

<script>
document.addEventListener("DOMContentLoaded", () => {
	$('.w-dropdown-toggle').on('keydown', e => {
  	if (e.keyCode === 13) {
    	const $toggle = $(e.target).closest('.w-dropdown-toggle');
      const $list = $toggle.closest('.w-dropdown').children('.w-dropdown-list'); 
      const opened = 'w--open';
      if ($toggle.hasClass(opened)) {
      	$toggle.removeClass(opened);
        $list.removeClass(opened);
      } else {
      	$('.w-dropdown-toggle').removeClass(opened);
        $('.w-dropdown-list').removeClass(opened);
      	$toggle.addClass(opened);
        $list.addClass(opened);
      }
    }
  });
});
</script>