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html - 汉堡菜单未在引导程序上打开

问题描述

使用引导程序时，我无法打开汉堡菜单。有人能告诉我代码有什么问题吗？

我直接从引导网站上提取了代码。我查看了其他人关于这个问题的问题，但建议的解决方案没有帮助。

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<nav class="navbar fixed-top navbar-expand-lg navbar-light" style="background-color: #ffffff;">
  <a class="navbar-brand" href="index.html">
    <img src="logo.png" width="200" height="200" class="d-inline-block align-top" alt="">
  </a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" 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">
        <a class="nav-link" href="portfolio.html">Portfolio </a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="about.html">About </a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="contact.html">Contact </a>
      </li>
    </ul>
  </div>
  <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
    <a href="#"></a>
    <a href="#" class="fa fa-instagram"></a>
  </div>
</nav>

请简单地为我解释一下，因为我是编码新手。我希望能够在移动设备上打开汉堡菜单。

标签： htmlcssbootstrap-4

解决方案

  • data-target和id不一样的。
  • 您需要jqueryandbootstrap.js才能使下拉菜单起作用。

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<nav class="navbar fixed-top navbar-expand-lg navbar-light" style="background-color: #ffffff;">
  <a class="navbar-brand" href="index.html">
    <img src="logo.png" width="50" height="50" class="d-inline-block align-top" alt="">
  </a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
    <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">
        <a class="nav-link" href="portfolio.html">Portfolio </a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="about.html">About </a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="contact.html">Contact </a>
      </li>
    </ul>
  </div>
  <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
    <a href="#"></a>
    <a href="#" class="fa fa-instagram"></a>
  </div>
</nav>
<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://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>

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