ES2015 did not include a loader specification, only a module specification. <a href="https:&#x2F;&#x2F;github.com&#x2F;nodejs&#x2F;node-eps&#x2F;blob&#x2F;master&#x2F;002-es6-modules.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;nodejs&#x2F;node-eps&#x2F;blob&#x2F;master&#x2F;002-es6-modul...</a> is the interop that will be present for node but it is outside of JS spec itself.