This is a follow-up to my first post on the upcoming Promise.allSettled()
function, coming soon to a node application near you.
Earlier today I was greeted by a Pull Request on my first post from GitHub user @j-f1
:
It turns out there is a handy way to add Promise.allSettled()
to your apps right now! 🎉. It's fiendishly simple to use, too.
The core-js npm package
That's right - core-js. From their README.md
, it is exactly what it sounds like:
- It is a polyfill of the JavaScript standard library, which supports:
- The latest ECMAScript standard.
- ECMAScript standard library proposals.
- Some WHATWG / W3C standards (cross-platform or closely related ECMAScript).
- It is maximally modular: you can easily choose to load only the features you will be using.
- It can be used without polluting the global namespace.
- It is tightly integrated with
babel
: this allows many optimizations ofcore-js
import.
Looking further down in the readme, there's a list of supported features in the polyfill:
Promise.allSettled
stage 2 proposal
Well hot damn! That'll do it!
How to use core-js
As @j-f1
indicated, in any project that uses babel
as a transpiler, all you need to do is add core-js to your project, and include it at your app's entry point:
First, add the dependency to your project
> yarn add core-js
Then, at your app's entry point (usually something like index.js
, or app.js
in the root of your project):
import 'core-js';
or, if you want to include just the Promise.allSettled()
polyfill, and nothing else, use:
import 'core-js/proposals/promise-all-settled';
That's it! 🍻
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