{%- assign default_paths = site.pages | map: “path” -%} {%- assign page_paths = site.header_pages | default: default_paths -%} {%- assign titles_size = site.pages | map: 'title' | join: '' | size -%}

{%- if titles_size > 0 -%} <nav class=“Navigation”>

<ul class="Navigation__items o-list-bare">
  {%- for path in page_paths -%}
    {%- assign nav_page = site.pages | where: "path", path | first -%}
    {%- if nav_page.title -%}
    <li class="Navigation__item{% if page.url == nav_page.url %} is-active{%endif%}">
      <a class="Navigation__link" href="{{ nav_page.url | relative_url }}">{{nav_page.title | escape}}</a>
    </li>
    {%- endif -%}
  {%- endfor -%}
</ul>

</nav> {% endif %}