fix(babel): Make babel module transpilation configurable per build ty…

…pe (#14)

config/babel/babel.config.js

@@ -1,30 +1,33 @@
-module.exports = {
-  babelrc: false,
-  presets: [
-    [
-      require.resolve('babel-preset-es2015'),
-      {
-        modules: false
-      }
-    ],
-    require.resolve('babel-preset-react')
-  ],
-  plugins: [
+module.exports = ({ webpack }) => {
+  const es2015Options = webpack ? { modules: false } : {};
+  const plugins = [
     require.resolve('babel-plugin-transform-class-properties'),
-    require.resolve('babel-plugin-transform-object-rest-spread'),
-    [
+    require.resolve('babel-plugin-transform-object-rest-spread')
+  ];
+
+  if (webpack) {
+    plugins.push([
       require.resolve('babel-plugin-transform-imports'),
       {
         'seek-style-guide/react': {
           transform: 'seek-style-guide/react/${member}/${member}',
           preventFullImport: true
         }
       }
-    ]
-  ],
-  env: {
-    production: {
-      presets: [require.resolve('babel-preset-react-optimize')]
-    }
+    ]);
   }
+
+  return {
+    babelrc: false,
+    presets: [
+      [require.resolve('babel-preset-es2015'), es2015Options],
+      require.resolve('babel-preset-react')
+    ],
+    plugins,
+    env: {
+      production: {
+        presets: [require.resolve('babel-preset-react-optimize')]
+      }
+    }
+  };
 };

config/jest/babelTransform.js

@@ -1,4 +1,4 @@
 const babelJest = require('babel-jest');
 const babelConfig = require('../babel/babel.config');
 
-module.exports = babelJest.createTransformer(babelConfig);
+module.exports = babelJest.createTransformer(babelConfig({ webpack: false }));

config/webpack/webpack.config.js

@@ -11,7 +11,7 @@ const thirdPartyModulesRegex = /node_modules\/(?!(seek-style-guide)\/).*/;
 const jsLoaders = [
   {
     loader: require.resolve('babel-loader'),
-    options: require('../babel/babel.config')
+    options: require('../babel/babel.config')({ webpack: true })
   }
 ];