如何改变 Bootstrap 4 中模态弹出窗口的内容？

Question

我在 Bootstrap 文档中找到了这个关于如何使用 JQuery 改变模态内容的示例：

<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@mdo">Open modal for @mdo</button>
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@fat">Open modal for @fat</button>
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@getbootstrap">Open modal for @getbootstrap</button>

<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">New message</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <form>
          <div class="form-group">
            <label for="recipient-name" class="col-form-label">Recipient:</label>
            <input type="text" class="form-control" id="recipient-name">
          </div>
          <div class="form-group">
            <label for="message-text" class="col-form-label">Message:</label>
            <textarea class="form-control" id="message-text"></textarea>
          </div>
        </form>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Send message</button>
      </div>
    </div>
  </div>
</div>

<script>
$('#exampleModal').on('show.bs.modal', function (event) {
  var button = $(event.relatedTarget) // Button that triggered the modal
  var title = button.data('title') // Extract info from data-* attributes
  var recipient = button.data('id') // Extract info from data-* attributes
  var modal = $(this)
  modal.find('.modal-title').text(title)
  modal.find('.modal-body input').val(recipient)
})
</script>

问题是它似乎只更改表单控件（输入或文本区域）的内容。我的目标是更改短信，但我没能做到。有什么想法吗？

谢谢！

Answer 1

我终于找到了解决方案。有人告诉任何地方模态可以被视为任何 html 标签，所以我决定测试使用 Vanilla JS 访问 DOM 像这样：

<script>
$('#exampleModal').on('show.bs.modal', function (event) {
  var button = $(event.relatedTarget)
  var title = button.data('title')
  var body = button.data('body')
  var modal = $(this)
  modal.find('.modal-title').text(title)
  document.getElementById('body').innerHTML = body
})
</script>

在模态框内，我用这种方式创建了一个 'body' div：

<div class="modal-body">
<div id="body"></div>
</div>

最后打开模态和传递数据的按钮的代码是：

<a class='btn btn-secondary btn-sm' href='#' data-toggle='modal' data-target='#exampleModal' data-title='Title text' data-body='Text body'>Launch modal</a>

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