Webpacker is installed by default in Rails 6.0 and up. The following steps will install Ruby2js and configure webpacker to use it:
Add the following line to your
gem 'ruby2js', require: 'ruby2js/rails'
Run the following commands:
./bin/rails rails webpacker:install:ruby2js
The following pages show examples of installing Ruby2JS preconfigured to support other popular frameworks.
Once installed, further configuration of the options and filters is done in
config/webpack/loaders/ruby2js.js for Webpacker and
config/initializers/ruby2js.rb for Sprockets/asset-pipeline.