blog_portal_itterate_through_child_pages.liquid

{% assign stop = false %}
{% assign next_url = "" %}

{% comment %} 
  Loop through all siblings of the current page (i.e. this page's parent's children) 
  Unfortunately, I haven't found any other liquid object that allows us to get "next sibling" ;)
{% endcomment %}
{% for child in sitemap.current.parent.children %}

    {% comment %} If, in the last itteration, it found the current page, this is the next page, set URL and exit {% endcomment %}
    {% if stop == true %}
        {% assign next_url = child.url %}
        {% break %}
    {% endif %}
    
    {% comment %} If this sibling is the current page, the next one will be the one we want {% endcomment %}
    {% if child.url == page.url %}
        {% assign stop = true %}
    {% endif %}
{% endfor %}

{% comment %} Use URL of next sibling page, appending any URL parameters (e.g. ?id=xxx) {% endcomment %}
<a id="anon-submit" href="{{ next_url }}{{ request.query }}" class="submit-btn btn btn-primary form-action-container-left">Continue</a>