webpack.config.production.js

import webpack from 'webpack';
import ExtractTextPlugin from 'extract-text-webpack-plugin';
import merge from 'webpack-merge';
import baseConfig from './webpack.config.base';

const config = merge(baseConfig, {
  devtool: 'cheap-module-source-map',

  entry: './app/index',

  output: {
    publicPath: '../dist/'
  },

  module: {
    loaders: [
      {
        test: /\.global\.css$/,
        loader: ExtractTextPlugin.extract(
          'style-loader',
          'css-loader!postcss-loader'
        )
      },

      {
        test: /^((?!\.global).)*\.css$/,
        loader: ExtractTextPlugin.extract(
          'style-loader',
          'css-loader?modules&importLoaders=1&localIdentName=[name]__[local]___[hash:base64:5]!postcss-loader'
        )
      }
    ]
  },

  plugins: [
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production')
    }),
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        screw_ie8: true,
        warnings: false
      }
    }),
    new ExtractTextPlugin('style.css', { allChunks: true })
  ],

  target: 'electron-renderer'
});

config.postcss = function postcss() {
  return [
    require('postcss-import'),
    require('postcss-size'),
    require('autoprefixer')({ browsers: ['last 2 versions'] }),
    require('postcss-calc')
  ];
};

export default config;