Optimize build process

webpack.dev.js

@@ -0,0 +1,23 @@
+const merge = require('webpack-merge');
+const common = require('./webpack.common.js');
+const ExtractTextPlugin = require("extract-text-webpack-plugin");
+
+const extractCSS = ExtractTextPlugin.extract({
+          fallback: "style-loader",
+          use: {
+            loader: "css-loader"
+          }
+        });
+
+module.exports = merge(common, {
+  module: {
+    loaders: [
+      { test: /\.css$/, use: extractCSS },
+      { test: /\.js(x)?$/, exclude: /node_modules/, loader: "babel-loader?cacheDirectory=true" }
+    ]
+  },
+  devtool: "eval-cheap-module-source-map",
+  devServer: {
+    contentBase: './dist'
+  },
+});