webpack.config.js

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

const nodeEnv = process.env.NODE_ENV || 'development';
const isProd = nodeEnv === 'production';

module.exports = {
  devtool: isProd ? 'hidden-source-map' : 'cheap-eval-source-map',
  entry: './lib/index.js',
  output: {
    path: path.join(__dirname, 'app', 'dist'),
    filename: 'bundle.js'
  },
  module: {
    loaders: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        loaders: [
          'babel-loader'
        ]
      },
      {
        test: /\.json/,
        loader: 'json-loader'
      }
    ]
  },
  plugins: [
    new webpack.ExternalsPlugin('commonjs', ['electron']),
    new webpack.optimize.UglifyJsPlugin({
      mangle: {
        keep_fnames: true
      },
      compress: {
        warnings: false
      },
      output: {
        comments: false
      },
      sourceMap: false
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true,
      debug: false
    }),
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify(nodeEnv)
      }
    })
  ]
};