Update: Check out headless-devtools, a library for automating DevTools actions from code by leveraging the DevTools Protocol Chrome DevTools is the go-to analysis tool for understanding what's going on under-the-covers of your app and conducting perf-audits. As you are interacting with the site like a real user would, you can use DevTools to drill-down to every tiny detail about the page. This is
![Monitoring unused CSS by unleashing the raw power of the DevTools Protocol](https://cdn-ak-scissors.b.st-hatena.com/image/square/bb36b4a9af7a32546e68152798eb56539ac51193/height=288;version=1;width=512/https%3A%2F%2Fblog.yonatan.dev%2Fcontent%2Fimages%2F2017%2F11%2Fslide_0-1.jpg)