Responsive Breakpoints

Hi, I used this plugin for over a week but there is a limitation that I would like to mention to make a better.

Responsive behavior
https://d33v4339jhl8k0.cloudfront.net/docs/assets/573acfa69033602af6969ed2/images/5ddd246b04286364bc923354/file-ALpQdlt3JX.jpg

If you can add options for each breakpoint and besides px provides %,vh,em for values as well then this will be better plugin because right now its only results in duplication of content which burdens page loading besides non-responsiveness.

Another feature would be to add a before image and after image as you did for background-color.

Looking forward