rollup.config.js

import { join } from 'path';
import json from 'rollup-plugin-json';
import resolve from 'rollup-plugin-node-resolve';
import babel from 'rollup-plugin-babel';
import copy from 'rollup-plugin-copy-glob';

export default {
  input: join('src', 'createMollieClient.ts'),
  external: [
    // These Node.js interenals are external to our bundles…
    ...['fs', 'https', 'path', 'url'],
    // …as are the dependencies listed in our package.json.
    ...Object.keys(require('./package.json').dependencies),
  ],
  output: [{ file: join('dist', 'mollie.cjs.js'), format: 'cjs' }, { file: join('dist', 'mollie.esm.js'), format: 'es' }],
  plugins: [
    json(),
    resolve({
      extensions: ['.ts'],
      customResolveOptions: {
        moduleDirectory: 'src',
      },
      preferBuiltins: true,
    }),
    babel({
      extensions: ['.ts'],
    }),
    copy([{ files: join('src', 'cacert.pem'), dest: 'dist' }]),
  ],
};