So, here is the jsfiddle:
Here is the link to the plugin (featherlight lightbox)
The issue is that using the default targetAttr (which is data-featherligh
data-featherligh
featherlight() has a build-in click trigger so you just need to call the plugin directly:
jQuery('.something_else').featherlight({ targetAttr: 'data-single', });
see: https://jsfiddle.net/5e9e2k6y/9/