rollup.config.js

import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';
import typescript from '@rollup/plugin-typescript';

export default {
  input: 'src/index.ts',
  output: {
    dir: 'public',
    format: 'cjs'
  },
  plugins: [
    resolve({ browser: true, preferBuiltins: true }),
    commonjs(),
    typescript()]
};