ViewComponent::Storybook

The ViewComponent::Storybook gem provides Ruby api for writing stories describing View Components and allowing them to be previewed and tested in Storybook via its Server support.

Features

A Ruby DSL for writing Stories describing View Components
A Rails controller backend for Storybook Server compatible with Storybook Controls Addon parameters
Coming Soon: Rake tasks to watch View Components and Stories and trigger Storybook hot reloading

Installation

Rails Installation

Add the view_component_storybook gem, to your Gemfile: gem 'view_component_storybook'
Run bundle install.
Add require "view_component/storybook/engine" to config/application.rb
Add **/*.stories.json to .gitignore

Configure Asset Hosts

If your view components depend on Javascript, CSS or other assets served by the Rails application you will need to configure asset_hosts apporpriately for your various environments. For local development this is a simple as adding to config/development.rb:

Rails.application.configure do
  ...
  config.action_controller.asset_host =  'http://localhost:3000'
  ...
end

Equivalent configuration will be necessary in config/production.rb or application.rb based you your deployment environments.

Storybook Installation

Add Storybook server as a dev dependedncy. The Storybook Controls addon isn't needed but is strongly recommended
```
yarn add @storybook/server @storybook/addon-controls --dev
```
Add an NPM script to your package.json in order to start the storybook later in this guide
```
{
  "scripts": {
    "storybook": "start-storybook"
  }
}
```

Create the .storybook/main.js file to configure Storybook to find the json stories the gem creates. Also configure the Controls addon:

module.exports = {
  stories: ['../test/components/**/*.stories.json'],
  addons: [
    '@storybook/addon-controls',
  ],
};

Create the .storybook/preview.js file to configure Storybook with the Rails application url to call for the html content of the stories
```
export const parameters = {
  server: {
    url: `http://localhost:3000/rails/stories`,
  },
};
```

Usage

Writing Stories

ViewComponent::Storybook::Stories provides a way to preview components in Storybook.

Suppose our app has a ButtonComponent that takes a button_text parameter:

class ButtonComponent < ViewComponent::Base
  def initialize(button_text:)
    @button_text = button_text
  end
end

We can write a stories describing the ButtonComponent

class ButtonComponentStories < ViewComponent::Storybook::Stories
  story(:with_short_text) do
    controls do
      text(:button_text, 'OK')
    end
  end

  story(:with_long_text) do
    controls do
      text(:button_text, 'Push Me Please!')
    end
  end
end

Generating Storybook Stories JSON

Generate the Storybook JSON stories by running the rake task:

rake view_component_storybook:write_stories_json

Start the Rails app and Storybook

In separate shells start the Rails app and Storybook

rails s

yarn storybook

Alternatively you can use tools like Foreman to start both Rails and Storybook with one command.

Configuration

By Default ViewComponent::Storybook expects to find stories in the folder test/components/stories. This can be configured by setting stories_path in config/application.rb. For example if you're using RSpec you might set the following configuration:

config.view_component_storybook.stories_path = Rails.root.join("spec/components/stories")

The Story DSL

Coming Soon

Parameters

Layout

Controls

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/jonspalmer/view_component_storybook. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

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

Code of Conduct

Everyone interacting in the ViewComponent::Storybook project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

nirebu/view_component_storybook