A Rails engine that bundles loosely-connected, production-ready Hotwire and Rails patterns distilled from The Hotwire Club challenge series. It's a growing collection, and each tool is independent: pull in the whole engine, use only the pieces you need. There's no shared runtime coupling between them beyond living in the same gem.

Each tool has its own usage guide under docs/.

• Optimistic Form - optimistic UI for Turbo forms: paint the predicted result instantly on submit, reconcile with the server only on failure.

Add the gem to your application's Gemfile:

gem "hotwire_club-toolbox"

Then run bundle.

Each tool ships with its own generator, so you install only what you use. For Optimistic Form:

bin/rails generate hotwire_club:toolbox:optimistic_form:install

• Ruby >= 3.2.0
• Rails >= 8.1.3
• turbo-rails ~> 2.0

You author the optimistic update as a Turbo Stream inside a <template>. On submit, a Stimulus controller clones it into the DOM so Turbo paints it instantly, then reconciles against the server only if the request fails. Here's a favorite toggle: the optimistic_template predicts the toggled state, and the button shows the current one.

<%= optimistic_form_for photo, attribute_name: :favorite, value: !photo.favorite do |form| %>
  <%= form.optimistic_template dom_id(photo, "favorite-button-icon"), favorite_button_icon(!photo.favorite) %>
  <%= form.button do %><%= favorite_button_icon(photo.favorite) %><% end %>
<% end %>

Full guide → docs/optimistic-form.md.

Issues and pull requests are welcome. See the CHANGELOG for what's shipped.

The gem is available as open source under the terms of the MIT License.