Hacky next / previous code

next - previous.njk

{% set currentProjectIndex = 0 %}
{% set countOfProjects = collections.design.length %}

{% for project in collections.design %}
  {% if project.url == page.url %}
  	{% set currentProjectIndex = loop.index0 %}
	{% endif %}
{% endfor %}

{% set previousProjectIndex = currentProjectIndex - 1  %}
{% set nextProjectIndex = currentProjectIndex + 1  %}

{% set previousProject = collections.design[previousProjectIndex] %}
{% set nextProject = collections.design[nextProjectIndex] %}

{% if previousProject %}
<p>Previous project: <a href="{{ previousProject.url | url }}" class="">{{ previousProject.data.title }}</a></h2>
{% endif %}

{% if nextProject %}
<p>Next project: <a href="{{ nextProject.url | url }}" class="">{{ nextProject.data.title }}</a></h2>
{% endif %}