Javascript 引导模式只会褪色而不会出现

我的引导模式没有显示，我的屏幕刚刚褪色。它可以在手机和平板电脑上使用，但在台式机上不起作用？有人知道为什么会这样吗

以下是代码：

<button type="button" class="btn btn-primary" data-toggle="modal" data-toggle="modal" data-target=".bd-example-modal-lg">Open Modal</button>


<div class="modal fade bd-example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">
  <div class="modal-dialog modal-lg">
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal">&times;</button>
        </div>
        <div class="modal-body">
          {{ module.author_image }}
          <p>
            {{ module.author_name }}
          </p>
          {{ module.author_description }}
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        </div>
      </div>
  </div>
</div>

js:

---

任何建议都会有帮助，谢谢！：

与css和js以及html中的类有太多冲突

建议如下：如果希望在模式中进行任何自定义更改，请在主div中添加一个类，然后仅对该类进行更改

你好，世界！ 开放模态 情态标题 {{module.author_image} {{module.author_name}

{{module.author_description}} 关 理解

---

您忘记了类中的-bs-：

    <button
  type="button"
  class="btn btn-primary"
  data-bs-toggle="modal"
  data-bs-target="#myModal"
>
  Open Modal
</button>

<div
  id="myModal"
  class="modal fade bd-example-modal-lg"
  tabindex="-1"
  role="dialog"
  aria-labelledby="myLargeModalLabel"
  aria-hidden="true"
>
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-bs-dismiss="modal">
          &times;
        </button>
      </div>
      <div class="modal-body">
        {{ module.author_image }}
        <p>{{ module.author_name }}</p>
        {{ module.author_description }}
      </div>
      <div class="modal-footer">
        <button
          type="button"
          class="btn btn-default"
          data-bs-dismiss="modal"
        >
          Close
        </button>
      </div>
    </div>
  </div>
</div>

---

如果我是正确的，当模态打开时，您希望焦点在输入元素上：

就是这样：

HTML:

---

这个问题已经被问到了，请在这里回顾一下答案，为什么你要使用所有覆盖css？在打开模式时，你想实现对myInput元素的关注，但你没有为它附加任何输入html标记？？？你想实现什么？？？@nikhilsugandh不，再次准备好我的问题：不，请准备好我的问题。我的模态没有显示，我的屏幕变暗了。在这个屏幕上模态也显示了。@Dejan给它一个绿色的勾号和一个可能的向上投票！！！试过了，没用！Tnx的帮助。只是尝试了你的Js和Css，它是为我工作。我会再看看的！

$('#myModal').on('shown.bs.modal', function (e) {
  $('#myInput').trigger('focus')
})

    <button
  type="button"
  class="btn btn-primary"
  data-bs-toggle="modal"
  data-bs-target="#myModal"
>
  Open Modal
</button>

<div
  id="myModal"
  class="modal fade bd-example-modal-lg"
  tabindex="-1"
  role="dialog"
  aria-labelledby="myLargeModalLabel"
  aria-hidden="true"
>
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-bs-dismiss="modal">
          &times;
        </button>
      </div>
      <div class="modal-body">
        {{ module.author_image }}
        <p>{{ module.author_name }}</p>
        {{ module.author_description }}
      </div>
      <div class="modal-footer">
        <button
          type="button"
          class="btn btn-default"
          data-bs-dismiss="modal"
        >
          Close
        </button>
      </div>
    </div>
  </div>
</div>

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<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 src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

$('#exampleModal').on('shown.bs.modal', function () {
  $('#recipient-name').trigger('focus')
})