Adam knows better than anyone, CSS knows about the user, device, variables, layout and more. But there is a little bit of information that CSS doesn’t have. Like what’s the current value of a range input exactly? What are the exact coordinates of the mouse? It’s not hard to pass over that information to CSS from JavaScript as Custom Properties, but even better, Adam has a new library for that.
With Prop For That, you just declaratively specify on any element the props you want, and live props show up.