rollup.config.js

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

export default [
  // browser-friendly UMD build
  {
    input: 'src/index.js',
    output: {
      file: pkg.browser,
      format: 'umd',
      name: 'ReactStaticGoogleMap',
      globals: {
        react: 'React',
        'prop-types': 'PropTypes',
      },
    },
    plugins: [resolve(), babel({ babelHelpers: 'bundled' }), commonjs()],
    external: ['react', 'prop-types'],
  },

  // CommonJS (for Node) and ES module (for bundlers) build.
  // (We could have three entries in the configuration array
  // instead of two, but it's quicker to generate multiple
  // builds from a single configuration where possible, using
  // the `targets` option which can specify `dest` and `format`)
  {
    input: 'src/index.js',
    output: [
      { file: pkg.main, format: 'cjs' },
      { file: pkg.module, format: 'es' },
    ],
    plugins: [babel({ babelHelpers: 'bundled' })],
    external: ['react', 'prop-types', 'react-promise', 'invariant'],
  },
];