webpack.config.js

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

module.exports = {
  devtool: 'cheap-module-eval-source-map',
  entry: './src/index',
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: '/static/',
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('development'),
      },
    }),
  ],
  resolve: {
    extensions: ['', '.webpack.js', '.web.js', '.js', '.json']
  },
  module: {
    loaders: [
      {
        test: /\.js$/,
        loaders: ['babel-loader'],
        exclude: /node_modules/,
      },
      {
        test: /\.json$/,
        loaders: ['json-loader'],
      },
      {
        test: /\.css$/,
        loader: 'style-loader!css-loader',
      },
    ],
  },
  externals: {
    fs: '{}',
    tls: '{}',
    net: '{}',
    console: '{}'
  },
};