Developers

image_data

It generates (like image tag) HTML IMG tag for given image path or object (e.g. Asset, Image) but renders data to data attributes. Site root prefix will be added automatically. Additional attributes (see image tag)may be supplied. 
{% image_data 'images/image_path.png' %}
#=> <img data-src=//site_root/images/image_path" />

{% image_data object %}
#=> <img data-src=//site_root/photos/photo_path.jpg" data-srcset="..." data-sizes="..." />