react-manifest-rails

https://github.com/olivernoonan/react-manifest-rails

react-manifest-rails automatically generates per-controller Sprockets manifest files for Rails applications using react-rails + Sprockets. It eliminates the monolithic application.js by creating lean, controller-specific ux_*.js bundles, watches for file changes in development, and provides a smart react_bundle_tag view helper that auto-selects the correct bundle per controller.