List posts by category

Overview

We can iterate over site.categories, each item is an array with two elements. The first element in the array is the category name, the second element is a list of the posts in that category.

...
{% for category in site.categories %}
  <h2>{{ category[0] }}</h2>
  <ul>
    {% for post in category[1] %}
      <li><a href="{{ post.url }}">{{ post.title }}</a></li>
    {% endfor %}
  </ul>
{% endfor %}
...