rollup.config.js

import json from '@rollup/plugin-json';
// import typescript from '@rollup/plugin-typescript';
import typescript from 'rollup-plugin-typescript2';
import resolve from '@rollup/plugin-node-resolve';
import replace from '@rollup/plugin-replace';
import commonjs from '@rollup/plugin-commonjs';
// import * as path from 'path';
import { name, main, module, version } from './package.json';

export default {
  input: 'src/index.ts',
  output: [
    {
      format: 'umd',
      // dir: path.parse(main).dir,
      file: main,
      name,
    },
    {
      format: 'esm',
      // dir: path.parse(module).dir,
      file: module,
      // }, {
      //   format: 'cjs',
      //   dir: 'cjs',
      // }, {
      //   dir: 'iffe',
      //   format: 'iife',
      //   name: 'myRollup',
    },
  ],
  plugins: [
    json(),
    resolve(),
    commonjs(),
    typescript({
      useTsconfigDeclarationDir: true,
    }),
    replace({
      __VERSION__: JSON.stringify(version),
    }),
  ],
};