webpack.config.js

const path = require('path');
const webpack = require('webpack');
const autoprefixer = require('autoprefixer');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const rootPath = process.cwd();

const webpackConfig = {
  context: __dirname,
  devtool: 'inline-source-map',
  devServer: {
    port: 3000,
    historyApiFallback: true,
  },
  entry: [
    'whatwg-fetch',
    './app/src/index.jsx',
  ],
  output: {
    path: path.join(rootPath, 'dist/'),
    filename: '[name]-[hash].js',
    publicPath: '/',
  },
  resolve: {
    extensions: ['', '.scss', '.css', '.jsx', '.js', '.json'],
    modulesDirectories: [
      'node_modules',
      path.resolve(__dirname, './node_modules')
    ]
  },
  module: {
    loaders: [{
      test: /(\.js|\.jsx)$/,
      exclude: /(node_modules)/,
      loader: 'babel',
      query: {
        presets: ['es2015', 'stage-0', 'react'],
      }
    }, {
      test: /(\.scss|\.css)$/,
      loader: ExtractTextPlugin.extract('style', 'css?sourceMap&modules&importLoaders=1&localIdentName=[name]__[local]___[hash:base64:5]!postcss!sass')
    }]
  },
  postcss: [autoprefixer],
  plugins: [
    new ExtractTextPlugin('styles.css', {
      allChunks: true,
    }),
    new HtmlWebpackPlugin({
      template: 'app/index.html',
      inject: 'body',
      filename: 'index.html'
    }),
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.NoErrorsPlugin(),
    new webpack.DefinePlugin({
      ENVIRONMENT: JSON.stringify(process.env.NODE_ENV || 'development'),
      VERSION: JSON.stringify(require('./package.json').version),
    }),
  ]
};

// Environment configuration
if (process.env.NODE_ENV === 'production') {
  webpackConfig.plugins.push(new webpack.optimize.UglifyJsPlugin({
    compress: {
      warnings: false,
      dead_code: true,
      drop_debugger: true,
      drop_console: true,
    },
    comments: false,
  }));
} else {
  webpackConfig.devtool = 'eval-source-map';
}

module.exports = webpackConfig;