332ff1dcae8cacb70530

rollup.config.js

import commonjs from 'rollup-plugin-commonjs';
import nodeResolve from 'rollup-plugin-node-resolve';

export default {
  entry: 'foo.js',
  format: 'cjs',
  plugins: [ nodeResolve(), commonjs() ],
  dest: 'bundle.js'
};