webpack.config.dev.js

const path = require('path')
const webpack = require('webpack')

module.exports = {
  devtool: 'cheap-module-eval-source-map',
  entry: [
    'eventsource-polyfill',
    'webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000&reload=false',
    './src/index'
  ],
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: '/static/'
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development')
    }),
  ],
  module: {
    loaders: [
      {
        test: /\.js?/,
        exclude: [/node_modules/, /styles/],
        loaders: ['babel'],
        include: path.join(__dirname, 'src')
      },
      {
        test: /\.scss$/,
        loaders: ["style", "css", "sass"],
        include: path.join(__dirname, 'src')
      }
    ]
  }
}