webpack.config.js

const path = require('path');
const webpack = require('webpack');
const TerserPlugin = require('terser-webpack-plugin');
const getPackageJson = require('./scripts/getPackageJson');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

const { version, name, license, repository, author } = getPackageJson(
  'version',
  'name',
  'license',
  'repository',
  'author'
);

const banner = `
yee
`;

module.exports = {
  mode: 'production',
  devtool: 'source-map',
  entry: './src/index.ts',
  output: {
    filename: 'index.js',
    path: path.resolve(__dirname, 'build'),
    library: 'MyLibrary',
    libraryTarget: 'umd',
    clean: true,
  },
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({ extractComments: false }),
      new CssMinimizerPlugin(),
    ],
  },
  module: {
    rules: [
      {
        test: /\.(m|j|t)s$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
        },
      },
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          MiniCssExtractPlugin.loader,
          { loader: 'css-loader', options: { sourceMap: true } },
        ],
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: 'css/index.css',
    }),
    new webpack.BannerPlugin(banner),
  ],
  resolve: {
    extensions: ['.ts', '.js', '.json'],
  },
};