webpack.config.js

const webpack = require('webpack');
const path = require('path');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const Dotenv = require('dotenv-webpack');

const extractCSS = new ExtractTextPlugin('[name].fonts.css');
const extractSCSS = new ExtractTextPlugin('[name].styles.css');

const BUILD_DIR = path.resolve(__dirname, 'build');
const SRC_DIR = path.resolve(__dirname, 'src');

module.exports = (env = {}) => ({
  entry: {
    index: [`${SRC_DIR}/index.js`],
  },
  output: {
    path: BUILD_DIR,
    filename: '[name].bundle.js',
  },
  // watch: true,
  devtool: env.prod ? 'source-map' : 'cheap-module-eval-source-map',
  devServer: {
    contentBase: BUILD_DIR,
    //   port: 9001,
    compress: true,
    hot: true,
    open: true,
  },
  node: {
    fs: 'empty',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            cacheDirectory: true,
            presets: ['react', 'env'],
            plugins: ['transform-class-properties'],
          },
        },
      },
      {
        test: /\.html$/,
        loader: 'html-loader',
      },
      {
        test: /\.(scss)$/,
        use: ['css-hot-loader'].concat(extractSCSS.extract({
          fallback: 'style-loader',
          use: [
            {
              loader: 'css-loader',
              options: { alias: { '../img': '../public/img' } },
            },
            {
              loader: 'sass-loader',
            },
          ],
        })),
      },
      {
        test: /\.css$/,
        use: extractCSS.extract({
          fallback: 'style-loader',
          use: 'css-loader',
        }),
      },
      {
        test: /\.(png|jpg|jpeg|gif|ico)$/,
        use: [
          {
            // loader: 'url-loader'
            loader: 'file-loader',
            options: {
              name: './img/[name].[hash].[ext]',
            },
          },
        ],
      },
      {
        test: /\.(woff(2)?|ttf|eot|svg)(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'file-loader',
        options: {
          name: './fonts/[name].[hash].[ext]',
        },
      }],
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.optimize.UglifyJsPlugin({ sourceMap: true }),
    new webpack.NamedModulesPlugin(),
    extractCSS,
    extractSCSS,
    new HtmlWebpackPlugin({
      inject: true,
      template: './public/index.html',
    }),
    new CopyWebpackPlugin(
      [{ from: './public/img', to: 'img' }],
      { copyUnmodified: false },
    ),
    new Dotenv(),
  ],
});