Move frontend babel configuration to webpack configuration file.

.babelrc

@@ -2,20 +2,14 @@
   "presets": [
     ["babel-preset-env", {
       "targets": {
-        "browsers": [
-          "> 1%",
-          "last 4 versions",
-          "Firefox ESR",
-          "ios >= 8"
-        ],
+        "node": true,
         "uglify": false
       },
       "spec": true,
-      "debug": true
+      "debug": false
     }]
   ],
   "plugins": [
-    "babel-plugin-transform-react-constant-elements",
     "babel-plugin-transform-class-properties",
     "babel-plugin-syntax-dynamic-import"
   ]

src/.babelrc

@@ -1,32 +0,0 @@
-{
-  "presets": [
-    ["babel-preset-env", {
-      "targets": {
-        "browsers": [
-          "> 1%",
-          "last 4 versions",
-          "Firefox ESR",
-          "ios >= 8"
-        ],
-        "uglify": false
-      },
-      /*"spec": true,*/
-      "debug": true,
-      "modules": false
-    }],
-    "babel-preset-react"
-  ],
-  "plugins": [
-    "react-hot-loader/babel",
-    "babel-plugin-transform-react-constant-elements",
-    /*"babel-plugin-transform-react-remove-prop-types",*/
-    /*"babel-plugin-transform-decorators-legacy",*/
-    "babel-plugin-transform-class-properties",
-    ["babel-plugin-transform-runtime", {
-      "helpers": false,
-      "polyfill": false,
-      "regenerator": true
-    }],
-    "babel-plugin-syntax-dynamic-import"
-  ]
-}

webpack.config.babel.js

@@ -28,6 +28,13 @@ const {
 
 const locales = ['en'];
 
+const autoprefixerTargets = [
+  '> 1%',
+  'last 4 versions',
+  'Firefox ESR',
+  'ios >= 8',
+];
+
 /**
  * Plugin for HtmlPlugin which inlines content for an extracted Webpack manifest
  * into the HTML in a <script> tag before other emitted asssets are injected by
@@ -153,7 +160,7 @@ export default (options) => {
           ident: 'postcss',
           plugins: [
             autoprefixer({
-              browsers: '> 1%, last 4 versions, Firefox ESR, ios >= 8',
+              browsers: autoprefixerTargets,
               grid: false,
             }),
           ],
@@ -190,7 +197,7 @@ export default (options) => {
     return cssLoaders;
   }
 
-  return {
+  const config = {
     devServer: {
       // inline: true,
       headers: {
@@ -214,11 +221,34 @@ export default (options) => {
           exclude: /node_modules/,
           options: {
             // Look for babel configuration in project directory
-            babelrc: true,
+            babelrc: false,
             // Cache transformations to the filesystem (in default temp dir)
             cacheDirectory: true,
-            // Skip module transpiling as Webpack 2+ support it ootb
+
             forceEnv: 'browser',
+
+            presets: [
+              ['babel-preset-env', {
+                targets: {
+                  browsers: autoprefixerTargets,
+                  uglify: false,
+                },
+                // spec: true,
+                debug: development,
+                modules: false, // do not transpile modules, webpack 2+ does that
+              }],
+              'babel-preset-react',
+            ],
+            plugins: [
+              'babel-plugin-transform-react-constant-elements',
+              'babel-plugin-transform-class-properties',
+              ['babel-plugin-transform-runtime', {
+                helpers: false,
+                polyfill: false,
+                regenerator: true,
+              }],
+              'babel-plugin-syntax-dynamic-import',
+            ],
           },
         },
         ...[