github << rails / stimulus / hotwire

Rails Importmaps (Managing JS Dependencies) October 15, 2025

To add an external javascript library (e.g. react.js) to a Rails app that uses importmap:


         
            $ bin/importmap pin react

To remove:


         
            $ bin/importmap unpin react

Or, you can open config/importmap.rb and add libraries manually.


         
            pin "react", to: "react-cdn-url-link"

All dependencies imported through importmap are loaded in the html head tag via the javascript_importmap_tags.