如何在Bootstrap Modal上附加.html()

<button type="button" id="myModalBtn" data-toggle="modal" data-target="#myModal">打开模态框</button>

<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="myModalLabel">模态框标题</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <!-- 这里是模态框的内容 -->
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">关闭</button>
        <button type="button" class="btn btn-primary">保存</button>
      </div>
    </div>
  </div>
</div>

$(document).ready(function() {
  $('#myModalBtn').click(function() {
    // 使用.html()方法加载并附加HTML内容
    $('.modal-body').html('<p>这是模态框中的HTML内容。</p>');
  });
});