v4.0.0.rc1 / 2025-01-23

v4.0.0.rc1 / 2025-01-23

Upgrade to Tailwind CSS v4

Upgrade guide is in the README.

General changes:

• Dependency on tailwindcss-ruby set to ~> 4.0.
• The location of (optional) postcss.config.js has moved from the config/ directory to the app root.

Changes to the tailwindcss:install task:

• The tailwindcss:install task no longer installs config/tailwind.config.js.
• The Inter font is no longer packaged with the gem.
• Some Tailwind class names are updated for v4.

New task tailwindcss:upgrade upgrades many apps cleanly:

• Cleans up some things in the generated config/tailwind.config.js.
• Runs the upstream upgrader (note: requires npx to run the one-time upgrade, but highly recommended).
• Removes references to the Inter font from the application layout.
• If present, moves config/postcss.config.js to the root directory.

Thanks to @EricGusmao and @excid3 for their help and advice on this work.