text: (() => {
    const bodyElement = document.body;
  
    const btnToggleElement = document.querySelector('.btn-toggle');
    
    btnToggleElement.addEventListener('click', (ev) => {
      (bodyElement.classList.contains('nav-isopen')) ? bodyElement.classList.remove('nav-isopen') : bodyElement.classList.add('nav-isopen');
    });
  })();