<nav class=“sidenavigation”>
<h1> <a href="{{ page.sidenav.mainurl }}"> {{ page.sidenav.mainname }} </a></h1> <ul> {% for link in page.sidenav.links %} <li> {% assign link_url = link.url | append: ".html" %} <a class="{% if page.url == link.url or page.url == link_url %}active{% endif %}" href="{{link.url}}">{{link.name}}</a></li> {% endfor %} </ul>
</nav>