Production build

With Vite or PostCSS

Nothing extra is needed. vite build runs the plugin, and Vite's own CSS minifier handles the result.

With the CLI

croff build

This scans your content files, generates minified CSS and writes it to output. It fails, and writes nothing, if any expression in a class attribute is invalid, so it's safe to run in CI.

croff check --strict

croff check validates without writing anything. With --strict, warnings such as runtime-built class names also fail it.

What ends up in the file

• Only the utilities found in your source.
• Only the theme variables those utilities use.
• Rules in a fixed order, so the same source produces the same bytes.

Unused utilities aren't removed from a large stylesheet, because they're never generated. See Build optimization.