<nav class=“navbar navbar-expand-lg sticky-top navbar-dark bg-dark”>

{% if page.type == "home" and paginator.page == 1 %}
  <a href="{{ "/" | relative_url }}" class="navbar-brand">{{ site.title | liquify }}</a>
{% else %}
  <a href="{{ "/" | relative_url }}" class="navbar-brand">{{ site.title | liquify }}</a>
{% endif %}
<button class="navbar-toggler collapsed" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
  <span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
  <div class="navbar-nav mr-auto">
    {% assign pages = site.pages | sort: 'title' %}
    {% for item in pages %}
      {% if item.type == "page" %}
        {% if item.title == page.title %}
          <a href="{{ item.url | relative_url }}" class="nav-item nav-link active">{{ item.title | liquify }}</a>
        {% else %}
          <a href="{{ item.url | relative_url }}" class="nav-item nav-link">{{ item.title | liquify }}</a>
        {% endif %}
      {% endif %}
    {% endfor %}
  </div>
</div>

</nav>