As you've probably guessed by the title of my article, I still consider Ruby on Rails as a relevant technology that offers a lot of value, especially when combined with ReactJS as it's frontend counterpart. Here's how I approach the topic.
Integrate Rails Application with React Using Webpacker Gem
Webpacker can be an interesting alternative to the popular create-react-app tool. Learn how to use this gem to integrate Rails with React.

Airbnb Map Clone Tutorial – React with Ruby on Rails
In this tutorial, we present how to build a map similar to the one on Airbnb using React app on the front-end and Rails 5 API on the back-end.
React on Rails Tutorial: Part 3 – Pagination
How to add a simple React pagination? Thanks to this tutorial you will be able to paginate the events based on the number of events on a page.
React on Rails Tutorial: Part 2
Have you added some event by accident or misspelled a name or description and you can't edit or remove the mistake? Our React on Rails tutorial will help!
React On Rails – part 1 [tutorial]
Thanks to this tutorial you can create the application which uses ReactJS on the front-end and Rails on the back-end in 21 steps. Read on!