The example code
<div class="navbar navbar-collapse" data-ks-navbar>
<nav>
<ul>
<!-- This will be the title and
the responsive collapse button -->
<li class="navbar-title">
<h1>Acme Corp</h1>
<button role="button">=</button>
</li>
<!-- These are the collapsed navigation
items. -->
<li>
<a href="/products/">Products</a>
</li>
<li>
<a href="/blog/">Blog</a>
</li>
</ul>
</nav>
<div>
Is not shown the collapse button in firefox and chrome when i enable a tablet or mobile layout in Developer Tools.