The syntax and semantic are both finalized. 
Wath&#x27;s remain open is the browser&#x27;s module loader specification (<a href="https:&#x2F;&#x2F;whatwg.github.io&#x2F;loader&#x2F;" rel="nofollow">https:&#x2F;&#x2F;whatwg.github.io&#x2F;loader&#x2F;</a>).