有没有更好的方法来识别在for循环中创建的按钮？

for (var i = 0; i < buttonCount; i++) {
  (function(index) {
    var button = document.createElement('button');
    button.innerText = 'Button ' + index;
    button.addEventListener('click', function() {
      console.log('Button ' + index + ' clicked');
    });
    document.body.appendChild(button);
  })(i);
}

for (var i = 0; i < buttonCount; i++) {
  var button = document.createElement('button');
  button.innerText = 'Button ' + i;
  button.setAttribute('data-index', i);
  button.addEventListener('click', function() {
    var index = parseInt(this.getAttribute('data-index'));
    console.log('Button ' + index + ' clicked');
  });
  document.body.appendChild(button);
}