Local navigation
Local navigation is used as a secondary level navigation.
Default local navigation
Use <ul> element with the .container (or .container-fluid) class, wrapped in a <nav> tag with .o-nav-local class.
You also need to choose a color scheme by setting .navbar-light or .navbar-dark on your <nav> element.
Accessibility
In addition to the .active class, you must use aria-current="page" attribute to represent the current item within the navigation group. This is to ensure a better accessibility to assistive technologies (such as screenreaders, screen magnifiers…) that support it by informing the user about the current element.
<nav role="navigation" class="o-nav-local navbar-light">
<ul class="container nav">
<li class="nav-item"><a class="nav-link active" href="#" aria-current="page">Home</a></li>
<li class="nav-item"><a class="nav-link" href="#">Profile</a></li>
<li class="nav-item"><a class="nav-link" href="#">Messages</a></li>
</ul>
</nav>Dark background
Simply switch .navbar-light to .navbar-dark class to your .o-nav-local parent <nav> container.
<div class="bg-dark pt-3 px-3 pb-1">
<nav role="navigation" class="o-nav-local navbar-dark">
<ul class="container nav">
<li class="nav-item"><a class="nav-link active" href="#" aria-current="page">Home</a></li>
<li class="nav-item"><a class="nav-link" href="#">Profile</a></li>
<li class="nav-item"><a class="nav-link" href="#">Messages</a></li>
</ul>
</nav>
</div>