使用 Bootstrap 4 在大屏幕上的 nav-pills 和小屏幕上的 navbar-nav 之间切换

Question

我喜欢大屏幕上的导航药丸的外观，但是一旦显示折叠按钮，我希望该菜单可以堆叠，并且看起来像附加的图像而不是药丸。我需要自定义 CSS 来实现这一点吗？

<div id="menu" class="navbar navbar-expand-md">
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".main-nav-collapse" aria-controls="main-nav-collapse" aria-expanded="true" aria-label="Toggle navigation">
        <span class="fa fa-bars"></span>
    </button>
    <div class="collapse navbar-collapse main-nav-collapse">
        <nav class="nav nav-pills mr-auto">
            <a class="nav-link" href="/"><i class="fa fa-home"></i></a>
        </nav>
    </div>
</div>

希望在较小的屏幕上使用此功能

希望这些药丸在更大的屏幕上而不是更小的屏幕上

Answer 1

您可以在此处切换d-none 和d-flex 这些类。

为什么在这里d-flex 而不是d-block 因为.nav 类是使用flexbox 制作的，所以flex 比block 更舒服。

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">

<!-- TILL 1200PX (XL) -->
<nav class="navbar navbar-expand-lg navbar-light bg-light d-flex d-xl-none">
  <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="#" tabindex="-1" aria-disabled="true">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>

<!-- AFTER 1200PX (XL) -->
<ul class="nav d-none d-xl-flex">
  <li class="nav-item">
    <a class="nav-link active" href="#">Active</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">Link</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">Link</a>
  </li>
  <li class="nav-item">
    <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
  </li>
</ul>

<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>

Answer 2

我用下面的代码完成了这个。

<nav class="nav nav-pills mr-auto flex-column d-md-flex flex-md-row">