Loop through Jekyll collections and list their posts

list-articles-by-collection.liquid

{% comment %}
    Loops though every collection you defined in _config.yml and grabs the pages they contain; outputting titles.
{%  endcomment %}

{% for collection in site.collections %}

  {% assign name = collection.label %}
  
    <h1>{{ name }}</h1>

    {% for post in site.[name] %}
    <ul>
      <li><a href="{{ post.url }}">{{ post.title }}</a></li>
    </ul>
    {% endfor %}

{% endfor %}