Is JavaScript Synchronous or Asynchronous? What the Hell is a Promise?

Learning to work in a single-threaded environment

Kait Hoehne
Feb 25, 2018 · 4 min read
Image for post
Image for post

JavaScript is Synchronous

Image for post
Image for post
Image by Aleks Shineleva

Asynchronous Callbacks

Image for post
Image for post
Image by Aleks Shineleva

Promises

Image for post
Image for post
Image by Aleks Shineleva

Async/Await

Image for post
Image for post
Anouk is exhausted after reading all that, too.

Better Programming

Advice for programmers.

Welcome to a place where words matter. On Medium, smart voices and original ideas take center stage - with no ads in sight. Watch

Follow all the topics you care about, and we’ll deliver the best stories for you to your homepage and inbox. Explore

Get unlimited access to the best stories on Medium — and support writers while you’re at it. Just $5/month. Upgrade

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store