clean npm packages and add babel transpilation

.eslintrc.js

@@ -20,7 +20,7 @@ module.exports = {
   },
   overrides: [
     {
-      files: ["config/webpack/**/*.js", "babel.config.js", "postcss.config.js"],
+      files: ["config/webpack/**/*.js", "babel.config.js"],
       env: {
         node: true,
       },

config/webpack/base.js

@@ -14,14 +14,23 @@ const sharedWebpackConfig = (mode) => {
       'gouvfr-nomodule': "./app/front/packs/gouvfr-nomodule.js",
       'gouvfr-module': "./app/front/packs/gouvfr-module.js",
     },
+    module: {
+      rules: [
+          {
+            test: /\.(js)$/,
+            exclude: /node_modules/,
+            use: ['babel-loader'],
+          }
+        ]
+    },
     // optimization: // optimization rules
     resolveLoader: {
       modules: [ 'node_modules' ],
     },
     output:   {
       filename: "[name].js",
-      chunkFilename: "[name]-[contenthash].digested.js",
-      sourceMapFilename: "[file]-[fullhash].map",
+      chunkFilename: "[name].digested.js",
+      sourceMapFilename: "[file].map",
       path: path.resolve(__dirname, '..', '..', 'app/assets/builds'),
       hashFunction: "sha256",
       hashDigestLength: 64,

package.json

@@ -6,21 +6,10 @@
     "@hotwired/turbo-rails": "^7.2.4",
     "@rails/ujs": "^6.0.3-4",
     "accessible-autocomplete": "^2.0.3",
-    "autoprefixer": "^10.4.17",
-    "css-loader": "^6.10.0",
-    "expose-loader": "^1.0.1",
-    "glob-parent": "^5.1.2",
     "jquery": "^3.5.1",
-    "normalize-url": "^4.5.1",
-    "postcss": "^8.4.34",
     "remixicon": "^4.2.0",
-    "sass": "^1.70.0",
-    "sass-loader": "^14.1.0",
     "slim-select": "^2.8.1",
     "stimulus": "^2.0.0",
-    "trim-newlines": "^3.0.1",
-    "webpack": "^5.90.0",
-    "webpack-cli": "^5.1.4",
     "whatwg-fetch": "^3.5.0"
   },
   "devDependencies": {
@@ -33,10 +22,18 @@
     "@babel/plugin-transform-regenerator": "^7.24.1",
     "@babel/plugin-transform-runtime": "^7.24.3",
     "@babel/preset-env": "^7.24.3",
+    "babel-loader": "^9.1.3",
     "babel-plugin-macros": "^3.1.0",
     "eslint": "^7.14.0",
+    "webpack": "^5.90.0",
+    "webpack-cli": "^5.1.4",
     "webpack-dev-server": "^3.11.0"
   },
+  "babel": {
+    "presets": [
+      "@babel/preset-env"
+    ]
+  },
   "scripts": {
     "lint:js": "eslint ./app/front/javascripts ./app/assets/javascripts ./config/webpack",
     "dev": "webpack serve --config ./config/webpack/webpack.config.js --mode development --progress",