Use the flexbox and margin utils responsively…
Bootstrap 4 alpha 6
http://codeply.com/go/YvzHvQQRAs (center brand & links)
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="d-md-flex d-block flex-row mx-md-auto mx-0">
<a class="navbar-brand" href="#">Navbar</a>
<div class="collapse navbar-collapse mr-auto" id="navbarNavAltMarkup">
<div class="navbar-nav">
<a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
<a class="nav-item nav-link" href="#">Features</a>
<a class="nav-item nav-link" href="#">Pricing</a>
<a class="nav-item nav-link disabled" href="#">Disabled</a>
</div>
</div>
</div>
</nav>
Bootstrap 4.1
https://www.codeply.com/go/sTJUthyswN (center brand, align left on mobile)
EDIT..
The answer is still basically the same. Use mx-auto
to center.
http://codeply.com/go/mycC5z8lpJ (center links, brand left)
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Navbar</a>
<div class="collapse navbar-collapse" id="navbarNavAltMarkup">
<div class="navbar-nav mx-auto">
<a class="nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
<a class="nav-link" href="#">Features</a>
<a class="nav-link" href="#">Pricing</a>
<a class="nav-link disabled" href="#">Disabled</a>
</div>
</div>
</nav>
If you want the links exactly centered in the viewport, see the 2nd example here: http://www.codeply.com/go/RCBftzZCD8
Other Bootstrap 4 Navbar alignment examples
Also see…
Center an element in Bootstrap 4 Navbar
Center Navbar links without brand pushing it to the right in Bootstrap 4?
How to center navbar in Bootstrap 4 using Flexbox
How to position navbar contents in Bootstrap 4
Bootstrap 4 Navbar align logo center and toggle icon on the left