Rewriting Tailwind CSS in OCaml: Is It (Pixel-)Correct?

I really like Tailwind CSS. Keeping styles next to the HTML makes it much easier to keep the two in sync. I can see which styles a component uses without tracing selectors across files, and removing the component doesn't leave me wondering which CSS rules are still needed elsewhere. In my projects, though, Tailwind also brought a Node.js toolchain into the build. I use OCaml for most of my software projects, including the code that generates HTML for web applications (like this blog!), so keeping a second build loop in sync was awkward. I wanted the same convenience within OCaml: a component could carry its Tailwind styles with it, and the build could generate both HTML and CSS together. That library became tw, which, as of its 1.1.0 release, builds whole Tailwind v4 projects, with their themes and plugins, and without Node.js. It is a drop-in replacement for the Tailwind CLI, whatever language your project is written in: $ brew install samoht/tap/tw # or: opam install tw $ tw -i…