Configuring ReactJS in Rails with Webpacker

Modern Javascript uses a lot of libraries and processing tools, including NPM, Yarn and Webpack. So when you use React, you need all these tools. Rails has had the asset pipeline for a long time and used Sprockets as the main tool. Since Rails 5.1 there's an alternative to Sprockets for Javascript: Webpacker. In Rails 6.0, Webpacker became the default. It uses Webpack to compile all your Javascript files. One of the big advantages of Webpack is that, in your development environment, it offers li