JetUi

ViewComponent-based UI library for Rails applications, matching the design system at ui.jetrockets.com.

• Ruby >= 3.0
• Rails >= 7.0
• ViewComponent >= 3.0
• Tailwind CSS v4 (configured in your host app)

Add to your Gemfile:

gem "jet_ui"

Run the install generator:

bundle install
rails generate jet_ui:install

The generator:

• Detects your Tailwind CSS source file and injects a single import covering all component stylesheets
• Registers JetUi Stimulus controllers in your app's controllers index

When the gem is updated, both CSS and JS are picked up automatically — no further changes needed. Safe to re-run after upgrades.

The jet_ui helper is available in all views:

<%= jet_ui.btn { "Save" } %>

<%= jet_ui.card do %>
  <%= jet_ui.card_header do %>
    <%= jet_ui.card_title "Hello" %>
  <% end %>
  <%= jet_ui.card_body do %>Content<% end %>
<% end %>

Subcomponents follow the namespace_subcomponent naming convention (card_header, alert_title, stat_label, etc.).

⚡ Requires Stimulus (configured automatically by jet_ui:install).

Sets up JetUi in your application (CSS + JS). Safe to re-run after gem upgrades — already-configured steps are skipped:

rails generate jet_ui:install

Copies a component's source files into your application for local customisation. Ejected files take precedence over the gem's versions automatically. For components with a Stimulus controller (e.g. flash), the JS file is ejected too.

rails generate jet_ui:eject btn
rails generate jet_ui:eject flash
rails generate jet_ui:eject btn card flash

By default the test, preview, and JS controller (when present) are all ejected. Use flags to skip any of them:

rails generate jet_ui:eject btn --skip-test
rails generate jet_ui:eject btn --skip-preview
rails generate jet_ui:eject flash --skip-javascript
rails generate jet_ui:eject btn --skip-test --skip-preview