webpack.config.base.js

/**
 * Base webpack config used across other specific configs
 */

import path from "path";
import webpack from "webpack";
import { dependencies as externals } from "./app/package.json";

export default {
  externals: [...Object.keys(externals || {})],

  module: {
    rules: [
      {
        test: /\.(?:jsx?|tsx?)$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            cacheDirectory: true,
          },
        },
      },
    ],
  },

  output: {
    path: path.join(__dirname, "app"),
    // https://github.com/webpack/webpack/issues/1114
    libraryTarget: "commonjs2",
  },

  /**
   * Determine the array of extensions that should be used to resolve modules.
   */
  resolve: {
    extensions: [".js", ".jsx", ".json", ".ts", ".tsx"],
    modules: [path.join(__dirname, "app"), "node_modules"],
  },

  plugins: [
    new webpack.EnvironmentPlugin({
      NODE_ENV: "production",
    }),
  ],
};