Upgrade to Rails 7, new JS build setup

app/javascript/application.js

@@ -0,0 +1,3 @@
+// Configure your import map in config/importmap.rb. Read more: https://github.com/rails/importmap-rails
+import "@hotwired/turbo-rails"
+// import "controllers"

app/javascript/channels/consumer.js

@@ -1,6 +0,0 @@
-// Action Cable provides the framework to deal with WebSockets in Rails.
-// You can generate new channels where WebSocket features live using the `rails generate channel` command.
-
-import { createConsumer } from "@rails/actioncable"
-
-export default createConsumer()

app/javascript/channels/index.js

@@ -1,5 +0,0 @@
-// Load all the channels within this directory and all subdirectories.
-// Channel files must be named *_channel.js.
-
-const channels = require.context('.', true, /_channel\.js$/)
-channels.keys().forEach(channels)

app/javascript/controllers/application.js

@@ -0,0 +1,9 @@
+import { Application } from "@hotwired/stimulus"
+
+const application = Application.start()
+
+// Configure Stimulus development experience
+application.debug = false
+window.Stimulus   = application
+
+export { application }

app/javascript/controllers/hello_controller.js

@@ -0,0 +1,7 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  connect() {
+    this.element.textContent = "Hello World!"
+  }
+}

app/javascript/controllers/index.js

@@ -0,0 +1,11 @@
+// Import and register all your controllers from the importmap under controllers/*
+
+import { application } from "controllers/application"
+
+// Eager load all controllers defined in the import map under controllers/**/*_controller
+import { eagerLoadControllersFrom } from "@hotwired/stimulus-loading"
+eagerLoadControllersFrom("controllers", application)
+
+// Lazy load controllers as they appear in the DOM (remember not to preload controllers in import map!)
+// import { lazyLoadControllersFrom } from "@hotwired/stimulus-loading"
+// lazyLoadControllersFrom("controllers", application)

app/javascript/packs/application.js

@@ -1,16 +0,0 @@
-// This file is automatically compiled by Webpack, along with any other files
-// present in this directory. You're encouraged to place your actual application logic in
-// a relevant structure within app/javascript and only use these pack files to reference
-// that code so it'll be compiled.
-
-require("@rails/ujs").start()
-require("turbolinks").start()
-require("channels")
-
-// import "stylesheets/application"
-// Uncomment to copy all static images under ../images to the output folder and reference
-// them with the image_pack_tag helper in views (e.g <%= image_pack_tag 'rails.png' %>)
-// or the `imagePath` JavaScript helper below.
-//
-// const images = require.context('../images', true)
-// const imagePath = (name) => images(name, true)