rollup.config.js

import commonjs from 'rollup-plugin-commonjs';
import resolve from 'rollup-plugin-node-resolve';
import babel from 'rollup-plugin-babel';
import pkg from './package.json';

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

const name = 'RollupTypeScriptBabel';

export default {
  input: './src/index.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: [
    // Allows node_modules resolution
    resolve({ extensions }),

    // Allow bundling cjs modules. Rollup doesn't understand cjs
    commonjs(),

    // Compile TypeScript/JavaScript files
    babel({ extensions, include: ['src/**/*'] }),
  ],

  output: [{
    file: pkg.main,
    format: 'cjs',
  }, {
    file: pkg.module,
    format: 'es',
  }, {
    file: pkg.browser,
    format: 'umd',
    name,

    globals: {},
  }],
};