React front end?

How would I go about adding React to my front end?
Do I scrap all the views that I currently built with html & css?

Installation is pretty easy if you already have Webpacker installed.

I’m not sure how this would interact with the existing app.

You definitely don’t have to scrap your existing views, in fact if you’re adding react I highly recommend that you only introduce react components for parts of your views that require holding state and executing javascript.

react-rails (GitHub - reactjs/react-rails: Integrate React.js with Rails views and controllers, the asset pipeline, or webpacker.) has a great guide on how to do everything you need.