{% assign links = site | sort: 'order' | map: 'url' %} {% for link in links %}

{% if link == page.url %}
  {% if forloop.first %}
    {% assign prevlink = links | last %}
    {% assign nextlink = links[forloop.index] %}
  {% elsif forloop.last %}
    {% assign prevlink = prev %}
    {% assign nextlink = links | first %}
  {% else %}
    {% assign prevlink = prev %}
    {% assign nextlink = links[forloop.index] %}
  {% endif %}
{% endif %}
{% assign prev = link %}

{% endfor %}

{% if prevlink and nextlink %}

<script type='text/javascript'>
  $('#prevlink').append(`<a href='{{ prevlink | absolute_url }}' display='none'>&#8249;</a>`);
  $('#nextlink').append(`<a href='{{ nextlink | absolute_url }}' display='none'>&#8250;</a>`);
</script>

{% endif %}