easy-going-rails/app/javascript/controllers/application.js

import { Application } from "@hotwired/stimulus"
const application = Application.start()

// Configure Stimulus development experience
const stimulusDebug = document.head.querySelector("meta[name=stimulus-debug]")
application.debug = stimulusDebug ? stimulusDebug.content === 'true' : false
window.Stimulus = application

export { application }