如何使颤动中的切换按钮弹出日历和时间

<div class="container">
  <button id="toggleButton">切换</button>
  <div id="calendar" style="display: none;">
    <!-- 日历/时间弹出框内容 -->
  </div>
</div>

.container {
  position: relative;
}

#toggleButton {
  background-color: #f1f1f1;
  border: none;
  padding: 10px;
  cursor: pointer;
}

#calendar {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #fff;
  border: 1px solid #ccc;
  padding: 10px;
}

var toggleButton = document.getElementById('toggleButton');
var calendar = document.getElementById('calendar');

toggleButton.addEventListener('click', function() {
  if (calendar.style.display === 'none') {
    calendar.style.display = 'block';
  } else {
    calendar.style.display = 'none';
  }
});