Comment by itsthecourier

just use importmaps

https://guides.rubyonrails.org/working_with_javascript_in_ra...

- Adding npm Packages with importmap-rails To add new packages to your import map-powered application, run the bin/importmap pin command from your terminal:

$ bin/importmap pin react react-dom

Then, import the package into application.js as usual:

import ReactDOM from "react-dom"