I wrote something simliar a while back called CSSess[1]. It's entirely JS and runs in the browser. It's based on yet another project called Helium[2]. The primary difference is that it crawls your site and checks over multiple pages. This is a must have feature for pretty much all sites.
I've been meaning to port it to node and run it with a headless browser. Contributions are always welcome.
I've been meaning to port it to node and run it with a headless browser. Contributions are always welcome.
1: http://cssess.com
2: https://github.com/geuis/helium-css/