ES2016 is already finished, it only has array.includes and the exponentiation operator[0].<p>We&#x27;ll have to wait for ES2017 at the earliest for async to arrive.<p>[0]<a href="http:&#x2F;&#x2F;www.2ality.com&#x2F;2016&#x2F;01&#x2F;ecmascript-2016.html" rel="nofollow">http:&#x2F;&#x2F;www.2ality.com&#x2F;2016&#x2F;01&#x2F;ecmascript-2016.html</a>