HTML

site.baseurl page.image_path

{% if page.img %}
  <img class="caption__media" data-interchange="
  {% for img in page.img %}
    [{{site.baseurl}}/asset/img/{{img[1]}} ({{img[0]}})]
    {% unless forloop.last %}, {% endunless %}
  {% endfor %}
  ">
{% endif %}