view_components

View Components for Rails

Simple library for building view components in Ruby on Rails.

Example

Declare a component by name, and define its sections and attributes:

# app/helpers/components_helper.rb
define_component :card, sections: [:body, :footer], attributes: [:title]

Define its structure using a partial view:

# app/views/components/_card.html.haml
.card
  %h1= card[:title]
  .content
    = card[:body]
  .footer
    = card[:footer]

Use it in your views:

-# app/views/welcome/index.html.haml
= card title: 'A value' do |c|
  - c.body do
    A block of HAML
    = link_to 'My page', my_page_path
  - c.footer do
    %span Another block of HAML

Installation

Add view_components to your Gemfile:

source 'https://rubygems.org'
gem 'view_components'

Usage

Each component is defined by its structure, sections and attributes. To register a component, first invoke define_component in a view helper, such as components_helper:

# app/helpers/components_helper.rb
define_component :card, sections: [:body, :footer], attributes: [:title]

The name of the component must be a valid identifier, as well as the sections and the attributes. This gem will then look for a partial view with defined name in the components views folder; app/views/components/_card.html.haml in the example.

The partial view will receive a hash as a local variable with the same name as the view (again, card), which will contain both the values of the attributes and sections.

define_component will also define a method for your views with the specified name, that can be used as a builder for the component. The content of each block will be captured and inserted in the specified location in the partial view.

Roadmap

Next in the roadmap is adding support for collections, which should act as sections that are inserted multiple times in the component.

Contributing

1. Fork it ( https://github.com/manastech/rails-view_components/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (with specs!) (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

License

The MIT License