Something like <a href="http:&#x2F;&#x2F;rollupjs.org" rel="nofollow">http:&#x2F;&#x2F;rollupjs.org</a> which statically analyzes your ES6 dependency graph and creates a bundle with only the parts you need. The author included an image that rips at ES6 syntax, including the new import statements. A tool like Rollup couldn&#x27;t work with dynamic exports like `module.exports = foobar`.