react-boilerplate/webpack.config.js

const webpack = require('webpack');

module.exports = {
  entry: [
    'webpack-dev-server/client?http://localhost:8080',
    'webpack/hot/only-dev-server',
    'react-hot-loader/patch',
    './src/index.js'
  ],
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loaders: ['react-hot-loader/webpack', 'babel-loader']
      }
    ]
  },
  resolve: {
    extensions: ['*', '.js', '.jsx']
  },
  output: {
    path: __dirname + '/build',
    publicPath: '/',
    filename: 'bundle.js'
  },
  devServer: {
    contentBase: './public',
    hot: true
  },
  plugins: [
    new webpack.optimize.ModuleConcatenationPlugin(),
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production')
      }
    })
  ]
};