I missed it when I first read the blog post, so I figure it&#x27;s worth emphasizing: the new async&#x2F;await support is <i>only</i> available on JavaScript engines that already support &quot;function*&quot; generator functions: Node 4, Firefox, and Chrome, but not Safari or IE&#x2F;Edge.<p>Supporting async&#x2F;await in ES5&#x2F;ES3 is on the roadmap for TypeScript v2.0. <a href="https:&#x2F;&#x2F;github.com&#x2F;Microsoft&#x2F;TypeScript&#x2F;wiki&#x2F;roadmap" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;Microsoft&#x2F;TypeScript&#x2F;wiki&#x2F;roadmap</a>