webpack.config.babel.js

const webpack = require('webpack');
const path = require('path');
const packgeJson = require('./package.json');

const babelrc = packgeJson.babel;

const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

const nodeEnv = process.env.NODE_ENV || 'development';
const isProduction = nodeEnv === 'production';

const buildPath = path.join(__dirname, './build');
const sourcePath = path.join(__dirname, './src');


// Common plugins
const plugins = [
  new webpack.optimize.CommonsChunkPlugin({
    name: 'vendor',
    filename: 'vendor-[hash].js',
    minChunks(module) {
      const context = module.context;
      return context && context.indexOf('node_modules') >= 0;
    },
  }),
  new webpack.DefinePlugin({
    'process.env': {
      NODE_ENV: JSON.stringify(nodeEnv),
    },
  }),
  new webpack.NamedModulesPlugin(),
  new HtmlWebpackPlugin({
    template: path.join(sourcePath, 'index.html'),
    path: buildPath,
    filename: 'index.html',
  }),
];

// Common rules
const rules = [
  {
    test: /\.(js|jsx)$/,
    exclude: /node_modules/,
    enforce: 'pre',
    loader: 'eslint-loader',
    options: { emitWarnings: true },
  },
  {
    test: /\.(js|jsx)$/,
    exclude: /node_modules/,
    use: {
      loader: 'babel-loader',
      options: {
        babelrc: false,
        ...babelrc,
        presets: [
          ['es2015', { modules: false }],
          ...babelrc.presets.filter(p => p !== 'es2015'),
        ],
      },
    },
  },
  {
    test: /\.(jpg|png|svg)$/,
    loader: 'file-loader',
    options: {
      name: '[path][name].[hash].[ext]',
    },
  },
];

if (isProduction) {
  // Minify and uglify js when built for PROD
  plugins.push(
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false,
        screw_ie8: true,
        conditionals: true,
        unused: true,
        comparisons: true,
        evaluate: true,
        if_return: true,
        join_vars: true,
      },
      output: {
        comments: false,
      },
    }),
    new ExtractTextPlugin('style-[hash].css')
  );

  // Separate the styles into an external CSS file
  rules.push(
    {
      test: /\.css$/,
      loader: ExtractTextPlugin.extract({
        fallback: 'style-loader',
        use: 'css-loader',
      }),
    }
  );
} else {
  // Development plugins + rules
  plugins.push(
    new webpack.HotModuleReplacementPlugin()
  );
  rules.push(
    {
      test: /\.css$/,
      exclude: /node_modules/,
      use: [
        { loader: 'style-loader', options: { sourceMap: true } },
        { loader: 'css-loader', options: { sourceMap: true } },
      ],
    }
  );
}

module.exports = {
  devtool: 'source-map',
  context: sourcePath,
  entry: {
    js: './index.js',
  },
  output: {
    path: buildPath,
    publicPath: '/',
    filename: 'app-[hash][name].js',
  },
  module: {
    rules,
  },

  resolve: {
    extensions: ['.webpack-loader.js', '.web-loader.js', '.loader.js', '.js', '.jsx'],
    modules: [
      path.resolve(__dirname, 'node_modules'),
      sourcePath,
    ],
  },
  plugins,
  devServer: {
    contentBase: isProduction ? buildPath : sourcePath,
    historyApiFallback: true,
    port: 8000,
    compress: isProduction,
    inline: !isProduction,
    hot: !isProduction,
    host: '0.0.0.0',
    disableHostCheck: true,
    overlay: {
      errors: true,
      warnings: false,
    },
    stats: {
      assets: true,
      children: false,
      chunks: false,
      hash: false,
      modules: false,
      publicPath: false,
      timings: true,
      warnings: true,
    },
  },
};