Warning: This blog post is outdated. Instead, read chapter “Asynchronous iteration” in “JavaScript for impatient programmers”. This blog post explains the ECMAScript proposal “Asynchronous Iteration” by Domenic Denicola and Kevin Smith. It has reached stage 4 on 2018-01-25 and is part of ECMAScript 2018. Asynchronous iteration # With ECMAScript 6, JavaScript got built-in support for synchronously