Question

我正在尝试组合一个 Bootstrap 导航栏，该导航栏在移动设备上显示时会折叠。

我一直在学习教程，但由于某种原因，当我减小窗口大小时，导航栏消失而不是折叠。谁能看到我哪里出错了。

我在标题中按此顺序使用以下内容：
bootstrap.css Bootstrap v4.0.0
jquery-3.2.1.min.js
bootstrap.min Bootstrap v4.0.0

我的代码：

 <nav class="navbar navbar-expand-md sticky-top"> 
    <button class="navbar-toggler" data-toggle="collapse" data-target="#menu1">
    <span class="navbar-toggler-icon"></span>
    </button>
   <div class="collapse navbar-collapse" id="menu1">
    <!-- Links -->
    <ul class="navbar-nav">
      <li class="nav-item">
        <a class="nav-link" data-target="#facilities">Facilities</a> 
      </li>
      <li class="nav-item"> 
        <a class="nav-link"  data-target="#benefits">Benefits</a>
      </li>
      <li class="nav-item"> 
        <a class="nav-link"  data-target="#spinaltherapy">Equine Spinal Therapy</a> 
      </li>
      <li class="nav-item"> 
        <a class="nav-link"  data-target="#contact">Contact and location</a> 
      </li>
      <li class="nav-item"> 
        <a class="nav-link" data-target="#gallery">Gallery</a> 
      </li>
      <li class="nav-item"> 
        <a class="nav-link"  data-target="#workwith">Who we work with</a> 
      </li>
    </ul>
    </div>
  </nav>

Answer 1

问题在于，使其可见的切换器样式不会被应用，除非它在 .navbar-light 或 .navbar-dark
即：

  .navbar-light .navbar-toggler-icon {
    background-image: escape-svg($navbar-light-toggler-icon-bg);
  }

所以只需添加 .navbar-light，您就可以看到按钮和图标。还可以考虑使用 .bg-light 或将 .navbar-dark.bg-dark 用于深色导航栏。

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

<nav class="navbar navbar-expand-md navbar-light sticky-top">
  <button class="navbar-toggler" data-toggle="collapse" data-target="#menu1">
    <span class="navbar-toggler-icon"></span>
    </button>
  <div class="collapse navbar-collapse" id="menu1">
    <!-- Links -->
    <ul class="navbar-nav">
      <li class="nav-item">
        <a class="nav-link" data-target="#facilities">Facilities</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-target="#benefits">Benefits</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-target="#spinaltherapy">Equine Spinal Therapy</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-target="#contact">Contact and location</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-target="#gallery">Gallery</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-target="#workwith">Who we work with</a>
      </li>
    </ul>
  </div>
</nav>


<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>

Bootstrap 4 导航栏可折叠用于移动设备

1 个答案: