webpack-prod.config.js

var path = require('path')
var webpack = require('webpack')

module.exports = {
  devtool: 'source-map',
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production')
      }
    }),
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.optimize.AggressiveMergingPlugin(),
    new webpack.optimize.UglifyJsPlugin({
      minimize: true,
      compress: {
        warnings: false
      }
    })
  ],
  entry: [
    path.join(__dirname, 'public', 'js', 'sweetalert-custom.js'),
    path.join(__dirname, 'src', 'main.js')
  ],
  output: { path: path.join(__dirname, 'public', 'js'), filename: 'bundle.js' },
  module: {
    loaders: [
      {
        test: /.jsx?$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
        query: {
          presets: ['es2015', 'react']
        }
      }
    ]
  }
}