为什么此 Bootstrap 导航栏的切换按钮无法正常工作？ [复制]答案

【问题标题】：Why is the toggle button of this Bootstrap Navbar not working properly? [duplicate]为什么此 Bootstrap 导航栏的切换按钮无法正常工作？ [复制]
【发布时间】：2018-06-15 08:07:39
【问题描述】：

我正在尝试创建一个带有切换按钮的基本引导导航菜单。当屏幕尺寸减小时，导航链接会按原样隐藏，但不会显示切换按钮。为什么会这样？有人可以帮我解决这个问题吗？谢谢！

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta charset="utf-8">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></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>
    <title>Stack</title>
    <style type="text/css">
      #nav {
        background-color: yellow;
      }
    </style>
  </head>
  <body class="sidebar-collapse">
    <nav class="navbar navbar-expand-md navbar-primaryfixed-top" id="nav">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">
          Stackoverflow
        </a>
        <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar2SupportedContent" aria-controls="navbar2SupportedContent" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse text-center justify-content-end" id="navbar2SupportedContent">
          <ul class="navbar-nav">
            <li class="nav-item">
              <a class="nav-link" href="#test">
                asdd
              </a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#servicesarea">
                dsdsas
              </a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#aboutme">
                daasdsda
              </a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#getintouchdiv">
                afdfdf
              </a>
            </li>
          </ul>
          &nbsp; &nbsp;
          <button class="btn navbar-btn ml-2 text-white btn-success">
            Sign in
          </button>
        </div>
      </div>
    </nav>
  </body>
</html>

外部链接也将不胜感激。

【问题讨论】：

请尝试使用最新的引导程序版本 4.1.1。这里的文档 - getbootstrap.com/docs/4.1/components/navbar 和这里的示例 - getbootstrap.com/docs/4.1/examples/navbars 希望，这对你有帮助。谢谢。
所以只是加载顺序的问题？

标签： html twitter-bootstrap navigation bootstrap-4

【解决方案1】：

请将此代码用于简单的引导导航栏

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-inverse">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span> 
      </button>
      <a class="navbar-brand" href="#">WebSiteName</a>
    </div>
    <div class="collapse navbar-collapse" id="myNavbar">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Home</a></li>
        <li><a href="#">Page 1</a></li>
        <li><a href="#">Page 2</a></li> 
        <li><a href="#">Page 3</a></li> 
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
        <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
      </ul>
    </div>
  </div>
</nav>
  
<div class="container">
  <h3>Basic Navbar Example</h3>
  <p>A navigation bar is a navigation header that is placed at the top of the page.</p>
</div>

</body>
</html>

【讨论】：

您提供了旧引导程序版本的示例。他要求引导程序 4。