webpack.common.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const Dotenv = require('dotenv-webpack');

const isDevelopment = process.env.NODE_ENV !== 'production';

module.exports = {
  entry: ['babel-polyfill', './src/index.js'],
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      title: 'Stop poster',
      template: path.resolve(__dirname, 'src/template.html'),
      inject: 'body',
      scriptLoading: 'blocking',
    }),
    isDevelopment && new Dotenv({ systemvars: true }),
  ].filter(Boolean),
  resolve: {
    modules: ['node_modules', 'src'],
    fallback: {
      assert: require.resolve('assert'),
    },
  },
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    globalObject: 'this',
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.worker\.js$/,
        use: ['babel-loader', 'worker-loader'],
        exclude: /node_modules/,
      },
      {
        // Global styles (no CSS Modules) — @font-face, :root vars, body reset
        test: /styles[\\/]base\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.css$/,
        exclude: /styles[\\/]base\.css$/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              modules: {
                localIdentName: '[name]_[local]_[hash:base64:5]',
                exportLocalsConvention: 'as-is',
              },
              importLoaders: 1,
              esModule: false,
            },
          },
        ],
      },
      {
        test: /\.svg$/,
        loader: 'raw-loader',
      },
    ],
  },
};