rollup.config.js

import babel from "rollup-plugin-babel";
import commonjs from "rollup-plugin-commonjs";
import resolve from "rollup-plugin-node-resolve";
import { terser } from "rollup-plugin-terser";
import pkg from "./package.json";

const extensions = [".js", ".jsx", ".ts", ".tsx"];

const name = "undoRedo";

export default [
  {
    input: "./src/undoRedo.ts",

    // Specify here external modules which you don"t want to include in your bundle (for instance: "lodash", "moment" etc.)
    // https://rollupjs.org/guide/en#external-e-external
    external: [],

    plugins: [
      // Compile TypeScript/JavaScript files
      resolve({ extensions }),

      commonjs(),

      babel({
        extensions,
        include: ["src/**/*"],
        runtimeHelpers: true
      }),

      terser()
    ],

    output: [
      {
        file: pkg.main,
        format: "umd",
        name,
        exports: "named"
      },
      {
        file: pkg.module,
        format: "es"
      }
    ]
  },
  {
    input: "./src/undoRedo.ts",

    // Specify here external modules which you don"t want to include in your bundle (for instance: "lodash", "moment" etc.)
    // https://rollupjs.org/guide/en#external-e-external
    external: [],

    plugins: [
      // Compile TypeScript/JavaScript files
      resolve({ extensions }),

      commonjs(),

      babel({
        extensions,
        include: ["src/**/*"],
        runtimeHelpers: true
      })
    ],

    output: [
      {
        file: pkg.main.replace(".min", ""),
        format: "umd",
        name,
        exports: "named"
      },
      {
        file: pkg.module.replace(".min", ""),
        format: "es"
      }
    ]
  }
];