tems, itemsList);
	  localStorage.setItem('items', JSON.stringify(items));
	  console.log(el.dataset.index);
  }
  addItems.addEventListener('submit', addItem);
  itemsList.addEventListener('click', toggleDone);
  populateList(items, itemsList);

    
  // 延伸部分
  const checkAllBtn = document.querySelector('.check-all');
  const unCheckAllBtn = document.querySelector('.uncheck-all');
  const deleteAllBtn = document.querySelector('.delete-all');
  
  checkAllBtn.addEventListener('click', () => {
  	it