Bootstrap 4 导航栏的汉堡扩展但不折叠答案

【问题标题】：Bootstrap 4 navbar's hamburger expands but does not collapseBootstrap 4 导航栏的汉堡扩展但不折叠
【发布时间】：2020-12-27 22:03:58
【问题描述】：

<head>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></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>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Poppins">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

/* 我试图把标志放在最左边，home 大约在中间，然后登录到右边。我这样做了，但汉堡包在移动视图中无法正常工作。它展开但不折叠*/

<body>
<nav class="navbar navbar-expand-md navbar-light bg-white shadow-sm nav-font">
    <div class="container">
        <a href="#">
            <img src="/storage/img/msprojectlogo.png" style="width:30%;">
        </a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="{{ __('Toggle navigation') }}">
            <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse justify-content-md-center" id="navbarSupportedContent">
            <!-- Left Side Of Navbar -->
            <ul class="navbar-nav ml-auto">
                <li class="nav-item p-1 pl-4"><a class="nav-link" href="/">Home</a></li>
                <li class="nav-item p-1 pl-4"><a class="nav-link" href="/about">About</a></li>
                <li class="nav-item p-1 pl-4"><a class="nav-link" href="/services">Services</a></li>
                <li class="nav-item p-1 pl-4"><a class="nav-link" href="/posts">Blog</a></li>
            </ul>
            <!-- Right Side Of Navbar -->
            <ul class="navbar-nav ml-auto">
                <li class="nav-item p-1 pl-4">
                    <a class="nav-link" href="#') }}</a>
                </li>
                <li class="nav-item p-1 pl-4">
                    <a class="nav-link" href="#</a>
                </li>
            </ul>
        </div>
    </div>
</nav>

【问题讨论】：

标签： html css laravel bootstrap-4

【解决方案1】：

有效，

您可以添加 Bootstrap CSS CDN

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <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://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></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>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Poppins">
</head>

<body>

  <nav class="navbar navbar-expand-md navbar-dark bg-dark shadow-sm nav-font">
      <div class="container">
          <a href="#">
              <img src="https://i.stack.imgur.com/q2xkQ.png" style="width:50%;">
          </a>
          <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="{{ __('Toggle navigation') }}">
              <span class="navbar-toggler-icon"></span>
          </button>

          <div class="collapse navbar-collapse justify-content-md-center" id="navbarSupportedContent">
              <!-- Left Side Of Navbar -->
              <ul class="navbar-nav ml-auto">
                  <li class="nav-item p-1 pl-4"><a class="nav-link" href="/">Home</a></li>
                  <li class="nav-item p-1 pl-4"><a class="nav-link" href="/about">About</a></li>
                  <li class="nav-item p-1 pl-4"><a class="nav-link" href="/services">Services</a></li>
                  <li class="nav-item p-1 pl-4"><a class="nav-link" href="/posts">Blog</a></li>
              </ul>
              <!-- Right Side Of Navbar -->
              <ul class="navbar-nav ml-auto">
                  <li class="nav-item p-1 pl-4">
                      <a class="nav-link" href="#') }}</a>
                  </li>
                  <li class="nav-item p-1 pl-4">
                      <a class="nav-link" href="#</a>
                  </li>
              </ul>
          </div>
      </div>
  </nav>
</body>

【讨论】：

它在我的电脑中不起作用，但我尝试在在线文本编辑器中进行操作并且它起作用了。 imgur.com/AvL9dlf这就是它在我的网络浏览器上的显示方式