uri')].forEach(($el) => {
    $el.style.display = ['401', '403', '404', '418', '505'].includes('{{ code }}') ? 'block' : 'none';
  });

  [...document.getElementsByClassName('go-back')].forEach(($el) => {
    if (document.referrer || history.length) {
      $el.setAttribute('href', '#back-to-the-future');

      $el.addEventListener('click', event => {
        history.back();
        event.preventDefault();

        return false;
      }, false);

      $el.style.display = 'inline-block';
    } else {
     