Bootstrap4 导航

如果你想创建一个简单的水平导航栏，可以在 <ul> 元素上添加 .nav类，在每个 <li> 选项上添加 .nav-item 类，在每个链接上添加 .nav-link 类:

<ul class="nav">
  <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" href="#">Link</a>
  </li>
  <li class="nav-item">
    <a class="nav-link disabled" href="#">Disabled</a>
  </li>
</ul>

导航对齐方式

.justify-content-center 类设置导航居中显示， .justify-content-end 类设置导航右对齐。

<!-- 导航居中 -->
<ul class="nav justify-content-center">
 
<!-- 导航右对齐 -->
<ul class="nav justify-content-end">
</div>

垂直导航

.flex-column 类用于创建垂直导航：

<ul class="nav flex-column">

选项卡

使用 .nav-tabs 类可以将导航转化为选项卡。然后对于选中的选项使用 .active 类来标记。

<ul class="nav nav-tabs">
  <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="#">Disabled</a>
  </li>
</ul>

胶囊导航

.nav-pills 类可以将导航项设置成胶囊形状。

<ul class="nav nav-pills">
  <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="#">Disabled</a>
  </li>
</ul>

导航等宽

.nav-justified 类可以设置导航项齐行等宽显示。

<ul class="nav nav-pills nav-justified">..</ul>
<ul class="nav nav-tabs nav-justified">..</ul>

胶囊下拉菜单

<ul class="nav nav-pills">
  <li class="nav-item">
    <a class="nav-link active" href="#">Active</a>
  </li>
  <li class="nav-item dropdown">
    <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#">Dropdown</a>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Link 1</a>
      <a class="dropdown-item" href="#">Link 2</a>
      <a class="dropdown-item" href="#">Link 3</a>
    </div>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">Link</a>
  </li>
  <li class="nav-item">
    <a class="nav-link disabled" href="#">Disabled</a>
  </li>
</ul>

选项卡下拉菜单

<ul class="nav nav-tabs">
  <li class="nav-item">
    <a class="nav-link active" href="#">Active</a>
  </li>
  <li class="nav-item dropdown">
    <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#">Dropdown</a>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Link 1</a>
      <a class="dropdown-item" href="#">Link 2</a>
      <a class="dropdown-item" href="#">Link 3</a>
    </div>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">Link</a>
  </li>
  <li class="nav-item">
    <a class="nav-link disabled" href="#">Disabled</a>
  </li>
</ul>

动态选项卡

如果你要设置选项卡是动态可切换的，可以在每个链接上添加 data-toggle="tab" 属性。 然后在每个选项对应的内容的上添加 .tab-pane 类。

如果你希望有淡入效果可以在 .tab-pane 后添加 .fade类:

<!-- Nav tabs -->
<ul class="nav nav-tabs">
  <li class="nav-item">
    <a class="nav-link active" data-toggle="tab" href="#home">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#menu1">Menu 1</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#menu2">Menu 2</a>
  </li>
</ul>
 
<!-- Tab panes -->
<div class="tab-content">
  <div class="tab-pane active container" id="home">...</div>
  <div class="tab-pane container" id="menu1">...</div>
  <div class="tab-pane container" id="menu2">...</div>
</div>

胶囊状动态选项卡

胶囊状动态选项卡只需要将以上实例的代码中 data-toggle 属性设置为 data-toggle="pill":

<!-- Nav pills -->
<ul class="nav nav-pills">
  <li class="nav-item">
    <a class="nav-link active" data-toggle="pill" href="#home">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="pill" href="#menu1">Menu 1</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="pill" href="#menu2">Menu 2</a>
  </li>
</ul>
 
<!-- Tab panes -->
<div class="tab-content">
  <div class="tab-pane active container" id="home">...</div>
  <div class="tab-pane container" id="menu1">...</div>
  <div class="tab-pane container" id="menu2">...</div>
</div>