webpack.config.js

const path = require('path')
const typescriptIsTransformer = require('typescript-is/lib/transform-inline/transformer').default
const nodeExternals = require('webpack-node-externals')
const webpack = require('webpack')
const packageJson = require('./package.json')

module.exports = (env) => ({
  mode: 'development',
  devtool: 'source-map',

  target: 'node',
  node: {
    __dirname: true,
    __filename: true,
  },
  entry: {
    index: './src/index.ts',
  },
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: '[name].js',
    library: 'scrape-pages',
    libraryTarget: 'umd',
  },

  resolve: {
    extensions: ['.ts', '.js'],
    alias: {
      '@scrape-pages': path.resolve(__dirname, 'src'),
      '@test': path.resolve(__dirname, 'test'),
    },
  },

  module: {
    rules: [
      {
        test: (content) => env === 'coverage' && /\.ts$/.test(content),
        include: path.resolve(__dirname, 'src'),
        exclude: [/node_modules/, /\.test\.ts$/, /query-debugger\.ts$/],
        loader: 'istanbul-instrumenter-loader',
        options: { esModules: true },
        enforce: 'post',
      },
      {
        test: /\.ts$/,
        exclude: /node_modules/,
        loader: 'ts-loader',
        options: {
          getCustomTransformers: (program) => ({
            before: [
              typescriptIsTransformer(program, {
                ignoreFunctions: true,
                ignoreMethods: true,
                disallowSuperfluousObjectProperties: true,
              }),
            ],
          }),
        },
      },
      {
        test: /\.ne$/,
        loader: 'nearley-loader',
      },
    ],
  },
  optimization: {
    minimize: false,
  },
  plugins: [
    new webpack.DefinePlugin({
      VERSION: JSON.stringify(packageJson.version),
    }),
  ],
  externals: [nodeExternals()],
})