Tailwind

Spina uses Tailwind 3 as its CSS framework to build all views. It uses the tailwindcss-rails gem which includes a CLI for generating Tailwind's CSS.

Spina hooks into your main app's assets:precompile task and adds the following steps:

1. Capture all paths that need to be scanned for Tailwind classes from Spina.config.tailwind_content
2. Generate a new Tailwind configuration file in app/assets/config/spina/tailwind.config.js
3. Use the Tailwind executable to compile Tailwind
4. Save Tailwind build to app/assets/builds/spina/tailwind.css

Spina plugins can add paths to the Spina.config.tailwind_content array which is then added to the Tailwind configuration file. This setup ensures that your Tailwind build always includes all classes needed when precompiling assets in production.

If you're developing a Spina plugin, you can use the rails spina:tailwind:build and rails spina:tailwind:watch tasks to generate new builds locally.