<nav class=“navbar pos-f-t” >

{% assign index_anchor = site.navigation.default | '' %}
<a class="navbar-brand nav-link" href="#{{ site.navigation.default }}">{{ site.title }}</a>

<button class="navbar-toggler hidden-md-up pull-xs-right" type="button" 
        data-toggle="collapse" data-target="#navbar-header" aria-controls="navbar-header">
    <i class="fa fa-bars" aria-hidden="true" ></i>
</button>

<div class="clearfix" ></div>

<div class="collapse navbar-toggleable-sm" id="navbar-header" >
    <ul class="nav navbar-nav">
        {% include navigation.html pages=include.pages %}
    </ul>
</div>

</nav> <!– /navbar –>