Question

自从我使用 Bootstrap 并试图让我的 NavBar 切换下拉列表以来，这已经是一个热点。我在这里查看了所有引导程序文档和其他论坛。有什么我遗漏的吗？

<nav class="navbar navbar-expand-lg navbar-light bg-light">
     <a class="navbar-brand" href="#">Navbar</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item active">
  <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
  </li>
  <li class="nav-item dropdown">
         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Links</a>
          <div class="dropdown-menu">
            <a class="dropdown-item">Edit</a>
            <a class="dropdown-item">Delete</a>
        </div>
  </li>
  <li class="nav-item dropdown">
         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Categories</a>
          <div class="dropdown-menu">
            <a class="dropdown-item">Edit</a>
            <a class="dropdown-item">Delete</a>
        </div>
  </li>
  </ul>
<ul class="navbar-nav ml-auto">
  <li class="nav-item dropdown">
    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
      User
    </a>
    <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
      <a class="dropdown-item" href="#">Manage</a>
    </div>
  </li>
    </ul>

Answer 1

确保您正确插入了引导程序库，并确保导航内容 ID 等于目标

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>

<nav class="navbar navbar-expand-lg navbar-light bg-light"role="navigation">
     <a class="navbar-brand" href="#"role="navigation">Navbar</a>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav">
<li class="nav-item active">
  <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
  </li>
  <li class="nav-item dropdown">
         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Links</a>
          <div class="dropdown-menu">
            <a class="dropdown-item">Edit</a>
            <a class="dropdown-item">Delete</a>
        </div>
  </li>
  <li class="nav-item dropdown">
         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Categories</a>
          <div class="dropdown-menu">
            <a class="dropdown-item">Edit</a>
            <a class="dropdown-item">Delete</a>
        </div>
  </li>
  </ul>
<ul class="navbar-nav ml-auto">
  <li class="nav-item dropdown">
    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
      User
    </a>
    <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
      <a class="dropdown-item" href="#">Manage</a>
    </div>
  </li>
    </ul>

Answer 2

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>

<nav class="navbar navbar-expand-lg navbar-light bg-light"role="navigation">
     <a class="navbar-brand" href="#"role="navigation">Navbar</a>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav">
<li class="nav-item active">
  <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
  </li>
  <li class="nav-item dropdown">
         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Links</a>
          <div class="dropdown-menu">
            <a class="dropdown-item">Edit</a>
            <a class="dropdown-item">Delete</a>
        </div>
  </li>
  <li class="nav-item dropdown">
         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Categories</a>
          <div class="dropdown-menu">
            <a class="dropdown-item">Edit</a>
            <a class="dropdown-item">Delete</a>
        </div>
  </li>
  </ul>
<ul class="navbar-nav ml-auto">
  <li class="nav-item dropdown">
    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
      User
    </a>
    <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
      <a class="dropdown-item" href="#">Manage</a>
    </div>
  </li>
    </ul>

Bootstrap 导航栏下拉菜单

2 个答案: