I spend a lot of time writing about CSS features that replace small pieces of JavaScript. The examples are usually easy to understand in isolation. Finding the same opportunity inside a real website is much harder.
A dropdown may be buried in a minified bundle. A modal may be a fixed <div> with a home-made focus trap. A reveal animation may only exist after you scroll halfway down the page.
I wanted to paste in a URL and get a useful answer to one question:
Which parts of this page could use native HTML or modern CSS instead?
So I built CSS Radar.
