jekyll-theme-isabelline/_includes/image.html

{% capture imagePath %}/assets/blog/{{ page.id | split: "/" | last }}/{{ include.name }}{% endcapture %}

{% capture src %}src="{{ imagePath }}"{% endcapture %}

{% assign alt=include.alt | default: "" %}
{% if alt != blank  %}
	{% capture alt %}alt="{{ include.alt }}" title="{{ include.alt}}"{% endcapture %}
{% endif %}

{% assign caption=include.caption | default: "" %}

{% if alt == blank and caption != blank %}
	{% assign alt=caption %}
{% endif %}

{% assign frame=include.frame | default: true %}

<figure class="figure {% if include.caption %}caption{% endif %} {% if frame %}frame{% endif %}">
	<a target="_blank" href="{{ imagePath }}"><img {{ src }} {{ alt }} width="100%" /></a>
	{% if caption != blank %}<figcaption>{{ caption }}</figcaption>{% endif %}
</figure>