rollup.config.js

import {babel} from '@rollup/plugin-babel';
import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';
import nodePolyfills from 'rollup-plugin-polyfill-node';

// Note: Order of plugins are important here - https://rollupjs.org/guide/en/#build-hooks
const basePlugins = [
  commonjs(),
  nodePolyfills(),
  resolve({browser: true, extensions: ['.js', '.ts']}),
  babel({babelHelpers: 'runtime', plugins: ['@babel/plugin-transform-runtime']}),
];

const packageNames = ['webrtc-core', 'webrtc-media'];

const rollupConfig = packageNames.map((packageName) => ({
  input: `./packages/${packageName}/dist/transpiled/index.js`,
  output: [{format: 'esm', dir: `packages/${packageName}/dist/esm`}],
  external: [/@babel\/runtime/],
  plugins: basePlugins,
  watch: {include: `./${packageName}/src/**`},
}));

export default rollupConfig;