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The Complete Guide to Modern JavaScript

ES2017: Async and Await

Async and await are going to be an important part of your coding knowledge, so let's learn how to use them.

We'll cover the following...

ES2017 introduced a new way of working with promises, called async and await.

 

Promise review #

Before we dive into this new strategy, let’s quickly review how we would usually write a promise:

Javascript (babel-node)
// fetch a user from github
fetch('api.github.com/user/AlbertoMontalesi').then( res => {
  // return the data in json format
  return res.json();
}).then(res => {
  // if everything went well, print the data
  console.log(res);
}).catch( err => {
  // or print the error
  console.log(err);
})

This is a very simple promise to fetch a user from GitHub and print it to the ...