Containers

Although it´s not required, you can wrap a navbar in a .container for boxed layout or .container-fluid for fluid layout.

Boxed layout

<div class="container">
  <nav class="navbar ...">
    ...
  </nav>
</div>

Fluid layout

<div class="container-fluid">
  <nav class="navbar ...">
    ...
  </nav>
</div>