<ul class="nav bs-sidenav">
    {%- for toc_item in page.toc %}
        <li class="main {% if toc_item.active %}active{% endif %}"><a href="{{ toc_item.url }}">{{ toc_item.title }}</a></li>
        {%- for toc_item in toc_item.children %}
            <li><a href="{{ toc_item.url }}">{{ toc_item.title }}</a></li>
        {%- endfor %}
    {%- endfor %}
</ul>
