Example webpack configuration

webpack.config.babel.js

import autoprefixer from 'autoprefixer';
import mqpacker from 'css-mqpacker';
import path from 'path';
import webpack from 'webpack';

let srcDir = path.join(__dirname, 'src');
let globalStylesDir = path.join(srcDir, 'scss');

let config = {
  context: srcDir,
  debug: true,
  devServer: {
    contentBase: 'public',
    historyApiFallback: true,
    hot: true,
  },
  devtool: 'eval-source-map',
  entry: [
    'webpack-dev-server/client?http://0.0.0.0:8080',
    'webpack/hot/only-dev-server',
    './index',
  ],
  module: {
    loaders: [
      {
        include: srcDir,
        loaders: [
          'react-hot',
          'babel',
        ],
        test: /\.jsx?$/,
      },
      {
        include: globalStylesDir,
        loaders: [
          'style',
          'css?modules&sourceMap&importLoaders=1&localIdentName=[local]',
          'postcss',
          'sass?sourceMap',
        ],
        test: /\.scss$/,
      },
      {
        exclude: globalStylesDir,
        include: srcDir,
        loaders: [
          'style',
          'css?modules&sourceMap&importLoaders=1&localIdentName=[name]__[local]__[hash:base64:5]',
          'postcss',
          'sass?sourceMap',
        ],
        test: /\.scss$/,
      },
      {
        include: srcDir,
        loader: 'url?limit=16384',
        test: /\.(jpg|png|ttf|eot|woff|woff2)$/,
      },
      {
        include: srcDir,
        loader: 'raw',
        test: /\.svg$/,
      },
      {
        loader: 'modernizr-auto',
        test: /\/\.modernizr-autorc$/,
      },
    ],
    preLoaders: [
      {
        include: srcDir,
        loader: 'eslint',
        test: /\.jsx?$/,
      },
    ],
  },
  output: {
    filename: 'app.js',
    path: path.join(__dirname, 'build/scripts'),
    publicPath: 'http://sparkit.dev.tribal.io:8080/scripts',
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
  ],
  postcss: [
    autoprefixer({
      browsers: [
        '> 1%',
        'last 2 versions',
        'ie >= 10',
      ],
      cascade: false,
    }),
    mqpacker(),
  ],
  resolve: {
    alias: {
      modernizr$: path.resolve(__dirname, '.modernizr-autorc'),
    },
    extensions: [
      '.jsx',
      '.js',
      '',
    ],
  },
};

if (process.env.NODE_ENV === 'production') {
  config.devtool = 'source-map';
  config.devServer = {};
  config.plugins = [
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production'),
      },
    }),
  ];
}

export default config;