将索引字母从JavaScript添加到列表

// 获取列表元素
const list = document.getElementById('myList');

// 创建包含索引字母的数组
const letters = Array.from({length: 26}, (_, i) => String.fromCharCode(65 + i));

// 循环遍历列表元素并添加索引字母
letters.forEach(letter => {
  const indexElement = document.createElement('li');
  indexElement.textContent = letter;
  list.appendChild(indexElement);
});

// 可以为索引字母创建锚链接或添加点击事件
letters.forEach(letter => {
  const indexElement = document.createElement('li');
  indexElement.textContent = letter;
  
  indexElement.addEventListener('click', () => {
    const targetElement = document.getElementById(letter);
    targetElement.scrollIntoView({ behavior: 'smooth' });
  });
  
  list.appendChild(indexElement);
});