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首页 > 解决方案 > 如何在 Bootstrap 4.3 中制作嵌入式下拉菜单？

html - 如何在 Bootstrap 4.3 中制作嵌入式下拉菜单？

问题描述

我正在尝试在 Bootstrap 4.3 的下拉菜单中实现下拉菜单。我尝试了这个似乎合乎逻辑但不起作用的代码。

<html>
  <head>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </head>
  <body>
    <button class="btn btn-success" id="dropdownMenuButton" data-toggle="dropdown">Click</button>
    <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton">
      <li>
        <a class="dropdown-item" href="#" role="button" id="dropdownSubmenuButton1" data-toggle="dropdown">Item 1</a>
        <div class="dropdown-menu" aria-labelledby="dropdownSubmenuButton1">
          <a class="dropdown-item" href="#">Submenu 1, Item 1</a>
          <a class="dropdown-item" href="#">Submenu 1, Item 2</a>
        </div>
      </li>
      <li>
        <a class="dropdown-item" href="#" role="button" id="dropdownSubmenuButton2" data-toggle="dropdown">Item 2</a>
        <div class="dropdown-menu" aria-labelledby="dropdownSubmenuButton2">
          <a class="dropdown-item" href="#">Submenu 2, Item 1</a>
          <a class="dropdown-item" href="#">Submenu 2, Item 2</a>
        </div>
      </li>
    </ul>
  </body>
</html>

单击根菜单项时，它会关闭而不显示任何子菜单。我也尝试用这里的文档中显示的方式替换ul-li：div-ahttps: //getbootstrap.com/docs/4.3/components/dropdowns/

<html>
  <head>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </head>
  <body>
    <button class="btn btn-success" id="dropdownMenuButton" data-toggle="dropdown">Click</button>
    <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
      <a class="dropdown-item" href="#" role="button" id="dropdownSubmenuButton1" data-toggle="dropdown">Item 1</a>
      <div class="dropdown-menu" aria-labelledby="dropdownSubmenuButton1">
        <a class="dropdown-item" href="#">Submenu 1, Item 1</a>
        <a class="dropdown-item" href="#">Submenu 1, Item 2</a>
      </div>
      <a class="dropdown-item" href="#" role="button" id="dropdownSubmenuButton2" data-toggle="dropdown">Item 2</a>
      <div class="dropdown-menu" aria-labelledby="dropdownSubmenuButton2">
        <a class="dropdown-item" href="#">Submenu 2, Item 1</a>
        <a class="dropdown-item" href="#">Submenu 2, Item 2</a>
      </div>
    </div>
  </body>
</html>

它也不起作用。但在这种情况下，单击第二个链接（项目 2）会打开第一个子菜单（子菜单 1），而不是绑定的子菜单 2。

标签： htmltwitter-bootstrap

解决方案

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