Migrating an existing Rails app to Phlex
Whether you currently use ActionView or ViewComponent with ERB, HAML or Slim, you can start using Phlex in your Rails app today without a big rewrite.
You can render Phlex views into existing templates
Phlex views implement the renderable interface for Rails, which means they can be rendered from a controller or another view template — even ViewComponent templates. This means you can gradually migrate specific views and components to Phlex without having to change everything at once.
If you're migrating from ViewComponent, you might find you can convert components to Phlex views without even changing any call-sites.
You can render ActionView partials and ViewComponent components in Phlex views
render method in Phlex doesn't only work with Phlex views. You can use it to render ActionView partials and ViewComponent components.
Use an ERB → Phlex converter
The ERB → Phlex converter, Phlexing, can do the heavy-lifting but it won't help you architect your components / design system.