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Last updated: 21 Oct 2020

The component system

Components are packages of template, style, behaviour and documentation. Components live in your application unless needed by multiple applications, then they are shared using the govuk_publishing_components gem.

Component guides

Components in applications are documented in component guides using the govuk_publishing_components gem. It mounts a component guide at the path /component-guide.

Find components in these guides:

Building components

A component must:

The govuk_publishing_components gem provides a generator to stub the files you’ll need in each component:

bundle exec rails generate govuk_publishing_components:component [component_name]

For example, a lead paragraph component would be included in a template like this:

<%= render 'components/lead-paragraph', text: "A description is one or two leading sentences" %>