Upgrade to Shakapacker 9.0.0.beta.11 and migrate to SWC

Gemfile.development_dependencies

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-gem "shakapacker", "8.2.0"
+gem "shakapacker", "9.0.0.beta.11"
 gem "bootsnap", require: false
 gem "rails", "~> 7.1"
 

Gemfile.lock

@@ -342,7 +342,7 @@ GEM
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
     semantic_range (3.1.0)
-    shakapacker (8.2.0)
+    shakapacker (9.0.0.beta.11)
       activesupport (>= 5.2)
       package_json
       rack-proxy (>= 0.6.1)
@@ -440,7 +440,7 @@ DEPENDENCIES
   scss_lint
   sdoc
   selenium-webdriver (= 4.9.0)
-  shakapacker (= 8.2.0)
+  shakapacker (= 9.0.0.beta.11)
   spring (~> 4.0)
   sprockets (~> 4.0)
   sqlite3 (~> 1.6)

spec/dummy/Gemfile.lock

@@ -346,7 +346,7 @@ GEM
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
     semantic_range (3.1.0)
-    shakapacker (8.2.0)
+    shakapacker (9.0.0.beta.11)
       activesupport (>= 5.2)
       package_json
       rack-proxy (>= 0.6.1)
@@ -441,7 +441,7 @@ DEPENDENCIES
   scss_lint
   sdoc
   selenium-webdriver (= 4.9.0)
-  shakapacker (= 8.2.0)
+  shakapacker (= 9.0.0.beta.11)
   spring (~> 4.0)
   sprockets (~> 4.0)
   sqlite3 (~> 1.6)

spec/dummy/config/shakapacker.yml

@@ -4,7 +4,6 @@ default: &default
   source_path: client/app
   source_entry_path: packs
   public_root_path: public
-
   cache_path: tmp/cache/shakapacker
   webpack_compile_output: false
   ensure_consistent_versioning: true
@@ -17,6 +16,9 @@ default: &default
   cache_manifest: false
   nested_entries: true
 
+  # Use SWC instead of Babel for transpilation (~20x faster)
+  swc: true
+
 development:
   <<: *default
   # Turn this to true if you want to use the rails/shakapacker check that the test
@@ -45,13 +47,13 @@ development:
     # Should we use gzip compression?
     compress: true
     # Note that apps that do not check the host are vulnerable to DNS rebinding attacks
-    allowed_hosts: 'all'
+    allowed_hosts: all
     pretty: true
     headers:
-      'Access-Control-Allow-Origin': '*'
+      Access-Control-Allow-Origin: "*"
     static:
       watch:
-        ignored: '**/node_modules/**'
+        ignored: "**/node_modules/**"
 
 test:
   <<: *default

spec/dummy/config/swc.config.js

@@ -0,0 +1,17 @@
+// config/swc.config.js
+// This file is merged with Shakapacker's default SWC configuration
+// See: https://swc.rs/docs/configuration/compilation
+
+module.exports = {
+  jsc: {
+    transform: {
+      react: {
+        runtime: 'automatic',
+        development: process.env.NODE_ENV === 'development',
+        // Only enable Fast Refresh when using webpack-dev-server (bin/dev)
+        // Not needed for static builds (bin/shakapacker)
+        refresh: !!process.env.WEBPACK_SERVE,
+      },
+    },
+  },
+};

spec/dummy/package.json

@@ -7,7 +7,6 @@
   },
   "private": true,
   "dependencies": {
-    "@babel/runtime": "7.17.9",
     "@hotwired/turbo-rails": "^8.0.4",
     "core-js": "3",
     "create-react-class": "^15.6.3",
@@ -29,17 +28,11 @@
     "regenerator-runtime": "^0.13.4"
   },
   "devDependencies": {
-    "@babel/core": "7.17.9",
-    "@babel/plugin-transform-runtime": "7.17.0",
-    "@babel/preset-env": "7",
-    "@babel/preset-react": "^7.10.4",
     "@pmmmwh/react-refresh-webpack-plugin": "^0.5.1",
     "@rescript/react": "^0.13.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
     "@types/react-helmet": "^6.1.5",
-    "babel-loader": "8.2.4",
-    "babel-plugin-transform-react-remove-prop-types": "^0.4.24",
     "compression-webpack-plugin": "9",
     "css-loader": "^6.5.1",
     "expose-loader": "^1.0.3",
@@ -51,15 +44,17 @@
     "sass": "^1.43.4",
     "sass-loader": "^12.3.0",
     "sass-resources-loader": "^2.1.0",
-    "shakapacker": "8.2.0",
+    "shakapacker": "9.0.0.beta.11",
     "style-loader": "^3.3.1",
     "terser-webpack-plugin": "5.3.1",
     "url-loader": "^4.0.0",
     "webpack": "5.72.0",
     "webpack-assets-manifest": "5",
     "webpack-cli": "4",
     "webpack-dev-server": "^4.9.0",
-    "webpack-merge": "5"
+    "webpack-merge": "5",
+    "@swc/core": "^1.7.39",
+    "swc-loader": "^0.2.6"
   },
   "browser": {
     "fs": false