webpack.config.js

const path = require("path");
const process = require("process");
const nodeExternals = require("webpack-node-externals");
const NodePolyfillPlugin = require("node-polyfill-webpack-plugin");

// eslint-disable-next-line @typescript-eslint/no-unused-vars
const BundleAnalyzerPlugin =
  require("webpack-bundle-analyzer").BundleAnalyzerPlugin;

const isProduction =
  process.argv.filter((arg) => arg.match(/production/)).length > 0;
const suffix = isProduction ? ".min.js" : ".js";

const generalConfig = {
  entry: {
    "moment-javaformat": path.resolve("./src/index"),
  },
  output: {
    path: path.resolve("./dist"),
    libraryTarget: "umd",
    libraryExport: "default",
  },
  externals: ["moment", "moment-timezone"],
  resolve: {
    modules: [path.resolve("./src"), path.resolve("./node_modules")],
    extensions: [".ts", ".js"],
  },
  module: {
    rules: [
      {
        test: /\.(js|ts)$/,
        exclude: /node_modules/,
        use: "babel-loader",
      },
    ],
  },
  plugins: [],
};

if (isProduction) {
  generalConfig.devtool = "cheap-module-source-map";
  generalConfig.plugins.push(new NodePolyfillPlugin());
} else {
  // generalConfig.plugins.push(new BundleAnalyzerPlugin());
}

const browserConfig = {
  target: "web",
  output: {
    filename: `[name]${suffix}`,
    path: path.resolve("./dist"),
    libraryTarget: "umd",
    libraryExport: "default",
    globalObject: "this",
    umdNamedDefine: true,
  },
};

const nodeConfig = {
  target: "node",
  externals: [nodeExternals()],
  output: {
    filename: `node${suffix}`,
    path: path.resolve("./dist"),
    libraryTarget: "umd",
    libraryExport: "default",
  },
};

module.exports = [
  Object.assign({}, generalConfig, browserConfig),
  Object.assign({}, generalConfig, nodeConfig),
];