wiki/content/20201026103714-javascript_async_functions.md

date	id	title
20201026	03f42b69-8321-443f-9d1d-fb7814999dd7	JavaScript Async Functions

Introduction

Async Functions¹ is a new feature implemented in ES2017 to handle promises.

Syntax

Fulfilling a promise

async function asyncFunc() {
  return 123;
}

asyncFunc().then((x) => console.log(x));
// 123

Rejecting a promise

async function asyncFunc() {
  throw new Error("Problem!");
}

asyncFunc().catch((err) => console.log(err));
// Error: Problem!

Footnotes

---

1. https://github.com/tc39/ecmascript-asyncawait ↩︎