CameraView/docs/_includes/navigation.html

<ul id="navigation" class="py-4">
    <li><a href="{{ site.baseurl }}/home">Home</a></li>
    {% for collection in site.collections %}
    {% if collection.label != "posts" %}
    <li class="mt-3"><h5 class="mt-0 mb-1">{{ collection.name }}</h5>
        <ul>
            {% assign docs = (collection.docs | sort: "order") %}
            {% for doc in docs %}
            <li class="pt-2 pb-2">
                <a href="{{ site.baseurl }}{{ doc.url }}">{{ doc.title }}</a>
            </li>
            {% endfor %}
        </ul>
    </li>
    {% endif %}
    {% endfor %}
</ul>
<script>
    /* find current item and make it active */
    const current = document.location.href;
    const links = document.querySelectorAll('#navigation a');
    links.forEach((link) => {
        if (current && link && current.endsWith(link.getAttribute('href'))) {
            link.parentElement.classList.add('active')
        }
    });
</script>