document.addEventListener('DOMContentLoaded', function() {
  toggleSummary();
});

function toggleSummary() {
  const openBtn = document.querySelector('.open-js');
  const closeBtn = document.querySelector('.close-js');
  const detailElements = document.querySelectorAll('details');

  openBtn.addEventListener('click', function(){
    detailElements.forEach((detail) =>  detail.setAttribute("open", ""));
  });

  closeBtn.addEventListener('click', function(){
    detailElements.forEach((detail) =>  detail.removeAttribute("open", ""));
  });
}