split the config

package.json

@@ -82,7 +82,8 @@
     "style-loader": "^0.19.0",
     "webpack": "^3.0.0",
     "webpack-build-notifier": "^0.1.16",
-    "webpack-dev-server": "^2.4.4"
+    "webpack-dev-server": "^2.4.4",
+    "webpack-merge": "^4.1.0"
   },
   "jest": {
     "setupFiles": [

webpack.config.js

 const path = require('path');
+const merge = require('webpack-merge');
 const MinifyPlugin = require('babel-minify-webpack-plugin');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 
-module.exports = {
-  devtool: 'source-map',
-  entry: {
-    polyfill: 'babel-polyfill',
-    main: path.resolve('./src/index.js'),
-  },
+const scopedConfig = {
   output: {
     filename: 'dist/index.js',
     library: 'paragon',
     libraryTarget: 'umd',
   },
-  resolve: {
-    extensions: ['.js', '.jsx'],
-  },
   plugins: [
     new ExtractTextPlugin('dist/paragon.min.css'),
-    new MinifyPlugin(),
   ],
   module: {
     rules: [
       {
-        test: /\.(js|jsx)$/,
-        exclude: /(node_modules|bower_components)/,
-        use: [
-          {
-            loader: 'babel-loader',
-            options: {
-              presets: ['env', 'minify'],
-            },
-          },
-          { loader: 'source-map-loader' },
-        ],
-      },
-      {
         test: /\.scss$/,
         use: ExtractTextPlugin.extract({
           use: [
@@ -61,6 +40,36 @@ module.exports = {
       },
     ],
   },
+};
+
+const commonConfig = {
+  devtool: 'source-map',
+  entry: {
+    main: path.resolve('./src/index.js'),
+  },
+  resolve: {
+    extensions: ['.js', '.jsx'],
+  },
+  plugins: [
+    new MinifyPlugin(),
+  ],
+  module: {
+    rules: [
+      {
+        test: /\.(js|jsx)$/,
+        exclude: /(node_modules|bower_components)/,
+        use: [
+          {
+            loader: 'babel-loader',
+            options: {
+              presets: ['env', 'minify'],
+            },
+          },
+          { loader: 'source-map-loader' },
+        ],
+      },
+    ],
+  },
   externals: [{
     react: {
       root: 'React',
@@ -86,3 +95,7 @@ module.exports = {
     },
   }],
 };
+
+module.exports = [
+  merge(commonConfig, scopedConfig),
+];