required negative callback and image-on-fail #57
Description
case: loading image, image-on-success-1, image-on-success-2.. image-on-success-N
or loading image, image-on-success, image-on-fail
and callback if image is not loaded
{{ message }}
case: loading image, image-on-success-1, image-on-success-2.. image-on-success-N
or loading image, image-on-success, image-on-fail
and callback if image is not loaded