如何冻结带有输入字段的html表格顶行？

<div class="table-container">
  <table>
    <thead>
      <tr>
        <th>列1</th>
        <th>列2</th>
        <th>列3</th>
      </tr>
    </thead>
    <tbody>
      <!-- 表格内容 -->
    </tbody>
  </table>
</div>

.table-container {
  height: 300px; /* 设置容器的高度 */
  overflow: auto; /* 显示滚动条 */
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  background-color: #f5f5f5;
}

tbody td {
  /* 表格内容样式 */
}

var tableContainer = document.querySelector('.table-container');
var tableHead = document.querySelector('thead');

tableContainer.addEventListener('scroll', function() {
  var scrollTop = tableContainer.scrollTop;
  var tableHeadHeight = tableHead.offsetHeight;

  if (scrollTop >= tableHeadHeight) {
    tableHead.style.position = 'fixed';
    tableHead.style.top = '0';
  } else {
    tableHead.style.position = 'static';
  }
});