Question

作为一个非前端人员，我已经查看了一些答案，因此没有扔烂番茄;-）

我有一个Bootstrap 4导航菜单，应该可以响应

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Navigation Menu</title>

    <script src="Libs/JQuery/jquery-3.3.1.slim.min.js"></script>
    <script>window.jQuery || document.write('<script src="Libs/JQuery/jquery-3.3.1.slim.min.js"><\/script>')</script>
    <script src="Libs/Popper/popper.min.js"></script>
    <script src="Libs/Bootstrap/js/bootstrap.bundle.js"></script>



    <link rel="stylesheet" type="text/css" href="Libs/Bootstrap/css/bootstrap.css" media="all">
    <link rel="stylesheet" type="text/css" href="Libs/Bootstrap/css/bootstrap-grid.css" media="all">
    <link rel="stylesheet" type="text/css" href="Libs/Bootstrap/css/bootstrap-reboot.css" media="all">
    <!--
    <link rel="stylesheet" type="text/css" href="css/Common.css" media="all">
    <link rel="stylesheet" type="text/css" href="css/Slider.css" media="all">
    -->

</head>

<body>

<nav class="navbar navbar-nav navbar-expand-md navbar-light bg-light">

    <a class="navbar-brand" href="#"><img src="Images/logo.png" alt="Logo">
        <!-- Carousel -->
    </a>

    <div class="collapse navbar-collapse offcanvas-collapse" id="main_menu">

        <ul class="navbar-nav mr-auto">
            <li class="nav-item">
                <a class="nav-link" href="#">PRODUKTE</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">DIENSTLEISTUNGEN</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">UNTERNEHMEN</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">NEWSROOM-STORY</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">SPOTLIGHT:TECHNIK

                </a>
            </li>
        </ul>

        <ul class="navbar-nav mr-auto">
            <li class="nav-item">
                <a class="nav-link text-danger" href="#">KUNDEN-COCKPIT</a>
            </li>
            <li class="nav-item">
                <a class="nav-link text-danger" href="#">SHOP</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">DATENSCHUTZ</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">KONTAKT</a>
            </li>
        </ul>

        <!-- Language Menu -->
        <ul class="navbar-nav mr-auto">
            <li class="nav-item">
                <a class="nav-link" href="#">DE</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">EN</a>
            </li>
        </ul>

        <button class="navbar-toggler p-0 border-0" type="button" data-toggle="offcanvas">
            <span class="navbar-toggler-icon"></span>
        </button>

    </div>

</nav>

在停止工作之前，菜单似乎工作正常。我阅读了很多教程，也经历了其他人的问题。

我尝试移动JQuery并稍后将所有其他JavaScript文件加载到CSS之前。我曾尝试过其他人调查其他站点上的布局并将其一些代码复制到我的站点中，但是当窗口大小更改时，事情仍然不想更改。

徽标保留，但菜单项保持不变或完全从屏幕上消失。

我的同事看着代码，他和我一样傻傻，但是我们俩都专注于更多的后端开发：-）

Answer 1

您已经包含了多个并不需要的css文件，如果要包括整个框架以及jQuery和bootstrap.css，则只需要bootstrap.min.css或boostrap.js。尝试遵循文档中详细介绍的结构：https://getbootstrap.com/docs/4.1/getting-started/introduction/

现在，这是您需要具有功能性响应式导航栏的标记，将其与代码进行比较以查看是否缺少某些内容；我看到您包括多个ul.navbar-nav，为什么？

编辑：认为我在切换按钮上找到了您的问题：

<button class="navbar-toggler p-0 border-0 ml-auto" type="button" data-toggle="collapse" data-target="#main_menu">
     <span class="navbar-toggler-icon"></span>
<button>

将data-toggle更改为collapse，不知道为什么要更改；您还需要在同一按钮上使用data-target="#your navbar ID"

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
<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="#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 mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Link</a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Dropdown
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <div class="dropdown-divider"></div>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

这正在使用您的代码

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" />
<nav class="navbar navbar-expand-lg navbar-light bg-light">

  <a class="navbar-brand" href="#"><img src="Images/logo.png" alt=""> Brand
  </a>

  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#main_menu">
                                <span class="navbar-toggler-icon"></span>
                            </button>

  <div class="collapse navbar-collapse" id="main_menu">

    <ul class="navbar-nav mr-auto">
      <li class="nav-item">
        <a class="nav-link" href="#">PRODUKTE</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">DIENSTLEISTUNGEN</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">UNTERNEHMEN</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">NEWSROOM-STORY</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">SPOTLIGHT:TECHNIK
                        
                                        </a>
      </li>
    </ul>

    <ul class="navbar-nav mr-auto">
      <li class="nav-item">
        <a class="nav-link text-danger" href="#">KUNDEN-COCKPIT</a>
      </li>
      <li class="nav-item">
        <a class="nav-link text-danger" href="#">SHOP</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">DATENSCHUTZ</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">KONTAKT</a>
      </li>
    </ul>

    <!-- Language Menu -->
    <ul class="navbar-nav mr-auto">
      <li class="nav-item">
        <a class="nav-link" href="#">DE</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">EN</a>
      </li>
    </ul>



  </div>

</nav>

Bootstrap 4响应菜单停止响应：-/

1 个答案: