{% assign default_paths = site.pages | map: “path” %} {% assign page_paths = site.header_pages | default: default_paths %}

<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
<a class="navbar-brand" href="{{ site.baseurl}}{% link index.md %}">{{ site.title }}</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
  <span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarsExampleDefault">
  <ul class="navbar-nav mr-auto">
    <li class="nav-item">
      <a class="nav-link" href="{{ site.baseurl}}{% link index.md %}">Home <span class="sr-only">(current)</span></a>
    </li>
    {% if page_paths %}
      {% for path in page_paths %}
      {% assign my_page = site.pages | where: "path", path | first %}
      {% if my_page.title %}
        <li class="nav-item">
          <a class="nav-link" href="{{ my_page.url | relative_url }}">{{ my_page.title | escape}}</a>
        </li>
      {% endif %}
      {% endfor %}
    {% endif %}
  </ul>
</div>

</nav>