Bootstrap 導航欄下拉菜單

Question

自從我使用 Bootstrap 並試圖讓我的 NavBar 切換下拉列表以來，這已經是很熱的一分鍾了。 我在這里查看了所有引導文檔和其他論壇。 有什么我想念的嗎？

<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

確保正確插入引導庫並確保導航內容 ID 等於目標

 <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>