rollup.config.js

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

export default [
  // browser-friendly UMD build
  {
    entry: 'index.js',
    dest: pkg.main,
    format: 'umd',
    moduleName: 'bezierIntersect',
    plugins: [
      resolve(), // so Rollup can find `ms`
      commonjs(), // so Rollup can convert `ms` to an ES module
      buble({  // transpile ES2015+ to ES5
        exclude: ['node_modules/**']
      })
    ]
  }

  // 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`)
  // {
  //   entry: 'src/main.js',
  //   external: ['ms'],
  //   targets: [
  //     { dest: pkg.main, format: 'cjs' },
  //     { dest: pkg.module, format: 'es' }
  //   ],
  //   plugins: [
  //     buble({
  //       exclude: ['node_modules/**']
  //     })
  //   ]
  // }
];