This Liquid loop for Jekyll sorts a collection by date in reverse order

for-loop-sorted-collection

{% comment %}
*
*  This loop loops through a collection called `collection_name`
*  and sorts it by the front matter variable `date` and than filters
*  the collection with `reverse` in reverse order
*
*  To make it work you first have to assign the data to a new string
*  called `sorted`.
*
{% endcomment %}
<ul>
    {% assign sorted = site.collection_name | sort: 'date' | reverse %}
    {% for item in sorted %}
    <li>{{ item.title }}</li>
    {% endfor %}
</ul>

@minheeyoon You‘re welcome. 😸

The date key is now default

As of Jekyll > v4.0.0 date, is the default key used for sorting collection items (provided the collection items have date keys.) The original liquid variable-assignment can be shortened:

<!-- `| sort: 'date '` can be omitted -->
{% assign sorted = site.collection_name | sort: 'date' | reverse %}
<!-- This will accomplish the same thing  -->
{% assign sorted = site.collection_name | reverse %}

By default, two documents in a collection are sorted by their date attribute when both of them have the date
key in their front matter. However, if either or both documents do not have the date key in their front matter,
they are sorted by their respective paths.
https://jekyllrb.com/docs/collections/#custom-sorting-of-documents

See Custom Sorting of Documents on the Collections page of Jekyll docs for more info.

I haven't tested your suggestion. But you write provided the collection items have date keys.

I think for being save it doesn't hurt, in case no date is associated, it doesnt count. What do you think?

Thanks so much for sharing this!