Question

Bootstrap 4：打开第一个模态，焦点就是其中的一个陷阱（您可以使用Tab键移动焦点，并且永远不会将元素聚焦在模态之外）。当您打开第二个模态时，焦点位于其中一个陷阱中，并且您再次无法将焦点放在元素外部（这是正确的）。当您关闭第二个模态时，焦点将回到第一个模态（这是正确的），但是问题是，如果使用Tab键移动焦点，则焦点将从第一个模态中消失（在最后一个可聚焦的modal1元素之后）。因此它不再被困在第一个模态中。引导程序4是否有解决问题的解决方案？

您可以在jsfiddle（firefox浏览器）中对其进行测试：
https://jsfiddle.net/4cnmvf13/1/

html5：

<!-- Modal2 -->
<div class="modal fade" id="exampleModal2" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel2" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel2">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        2
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>



<!-- Modal1 -->
<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">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        1
        <!-- Button trigger modal2 -->
      <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal2">
        Launch demo modal
      </button>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>


<!-- Button trigger modal1 -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
  Launch demo modal
</button>

css：

#exampleModal2 {
  z-index: 200000;
}

Answer 1

Bootstrap似乎无法处理这种情况，您可以处理下面的事件，以在模型中获取所需的tab-index

$('#exampleModal2').on('show.bs.modal', function () {
  $('#exampleModal').modal("hide");
})

$('#exampleModal2').on('hide.bs.modal', function () {
  $('#exampleModal').modal("show");
})

#exampleModal2 {
  z-index: 1600;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>



<div class="modal fade" id="exampleModal2" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel2" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel2">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        2
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>



<!-- Modal1 -->
<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">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        1
        <!-- Button trigger modal2 -->
      <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal2">
        Launch demo modal
      </button>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>


<!-- Button trigger modal1 -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
  Launch demo modal
</button>

Bootstrap 4模态超过模态焦点陷阱

1 个答案: