Async / Await

0 lessons

1 code snippet

2 question banks

3 community items

async-await

Code Snippets

1 snippet

Code Snippet

Fetch with Async/Await Recipes

The browser and Node 22+ both ship `fetch`, but the easy-to-miss details (`response.ok`, content-type parsing, body shape on POST, parallel error isolation) are exactly where bugs hide. This snippet collects four recipes built on `async`/`await` and a mocked `fetch` so each example runs end-to-end. Use it as the baseline for code that talks to JSON APIs without reaching for axios or a wrapper library.

705

Question Banks

2 items

Question Bank

Promises and async/await Basics

Beginner drills on Promise resolution order, async/await semantics, and the microtask queue. Three short JavaScript snippets you can predict line-by-line.

155

Question Bank

Premium

JavaScript Promise, async/await, and Event Loop Traces

Six traces emphasizing microtask vs macrotask ordering, `Promise.all` timing, `await`-as-microtask sequencing, and the classic `var` + `setTimeout` loop pitfall.

JavaScript

quiz

js-event-loop

promises

async-await

832

Hard

Community

3 items

Code Snippet

A Redux + redux-saga Wiring I Still Reach For

redux-saga still earns its keep when async workflows get tangled. The wiring I copy-paste into legacy codebases, plus the takeEvery vs takeLatest decision and the canonical fetch saga.

1.1k

May 11, 2026

by @felixhaddad

Article

Promises, await, and the Microtask Queue

What a microtask actually is, why Promise.resolve().then never runs synchronously, how await schedules continuations as microtasks, and the four-column trace I run when ordering surprises me.

promises

async-await

js-microtask-macrotask

js-event-loop

concurrency

225

4.3 (9)

Dec 28, 2025

by @adaezeaziz

Article

Iterators, Generators, and Async Generators

One protocol, three layers. The iterator protocol with its single next method, generators as sugar over it, and async generators for streaming data with back-pressure. The lazy pipeline pattern I reach for every week.

174

4.4 (11)

Nov 24, 2025

by @owentoure