webpack.config.prod.js

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

module.exports = {
  entry: [
    'babel-polyfill',
    './src/index'
  ],
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: '/'
  },
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production')
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        warnings: false
      }
    })
  ],
  module: {
    loaders: [{
      test: /\.js$/,
      loaders: ['babel'],
      include: path.join(__dirname, 'src')
    }, {
      test: /\.css$/, // Only .css files
      loader: 'style!css' // Run both loaders
    },
    {
      test: /\.scss$/,
      include: path.join(__dirname, 'src'),
      loaders: ["style", "css", "sass"]
    },
    {
      test: /\.json$/,
      loader: 'json'
    },
    {test: /\.png$/, loader: 'url-loader?mimetype=image/png'},
    { test: /\.woff(\?v=\d\.\d\.\d)?$/,   loader: 'url?limit=10000&mimetype=application/font-woff' },
    { test: /\.woff2(\?v=\d\.\d\.\d)?$/,   loader: 'url?limit=10000&mimetype=application/font-woff' },
    { test: /\.ttf(\?v=\d\.\d\.\d)?$/,    loader: 'url?limit=10000&mimetype=application/octet-stream' },
    { test: /\.eot(\?v=\d\.\d\.\d)?$/,    loader: 'file-loader' },
    { test: /\.svg(\?v=\d\.\d\.\d)?$/,    loader: 'url?limit=10000&mimetype=image/svgxml' }
    ]
  }
};