webpack.config.js

const ExtractTextPlugin = require('extract-text-webpack-plugin');
const path = require('path');

module.exports = {
  entry: {
    main: './client/js/main.js',
  },
  output: {
    path: path.join(__dirname, '/public/'),
    filename: 'js/[name].js', // Template based on keys in entry above
  },
  module: {
    loaders: [
      {
        test: /\.js$/,
        exclude: /(node_modules)/,
        loader: 'babel-loader',
        query: {
          presets: ['es2015', 'react'],
        },
      },
      {
        test: /\.json$/,
        loader: 'json-loader',
      },
      {
        test: /\.scss$/,
        loader: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: ['css-loader', 'sass-loader'],
        }),
      },
      {test: /\.css(\?v=\d+\.\d+\.\d+)?$/, loader: 'css-loader'},
    ],
  },
  plugins: [
    new ExtractTextPlugin('style/[name].css'),
  ],
};