tabler/src/pages/_includes/docs/menu.html

{% assign current-menu = page.menu | split: '.' %}

<ul class="nav nav-pills nav-vertical">
	{% for doc in site.data.docs %}
	<li class="nav-item">
		{% assign key = doc[0] %}
		{% assign item = doc[1] %}

		{% assign current-item = false %}
		{% if current-menu[1] == key %}
			{% assign current-item = true %}
		{% endif %}

		<a href="{% if item.children %}#menu-{{ key }}{% else %}{{ site.base }}{{ item.url | relative_url }}{% endif %}" class="nav-link{% unless item.children %}{% if current-item %} active{% endif %}{% endunless %}"{% if item.children %} data-bs-toggle="collapse" aria-expanded="{% if current-item %}true{% else %}false{% endif %}"{% endif %}>
			{% if item.icon %}
				<span class="nav-link-icon">{% include ui/icon.html icon=item.icon %}</span>
			{% endif %}

			{{ item.title }}

			{% if item.show-version %}
				<span class="badge bg-blue-lt ms-auto">{{ site.data.package.version }}</span>
			{% endif %}

			{% if item.children %}
				<span class="nav-link-toggle"></span>
			{% endif %}
		</a>

		{% if item.children %}
			<ul class="nav nav-pills collapse{% if current-item %} show{% endif %}" id="menu-{{ key }}">
			{% for subdoc in item.children %}
				{% assign subkey = subdoc[0] %}
				{% assign subitem = subdoc[1] %}

				{% assign current-subitem = false %}
				{% if current-menu[2] == subkey %}
					{% assign current-subitem = true %}
				{% endif %}

				<li class="nav-item">
					<a href="{{ site.base }}{{ subitem.url | relative_url }}" class="nav-link{% if current-subitem %} active{% endif %}">
						{{ subitem.title }}
					</a>
				</li>
			{% endfor %}
			</ul>
		{% endif %}
	</li>
	{% endfor %}
</ul>