These are the 5 most transformative JavaScript features from ES9

JavaScript has come a long way in the past 10 years with brand new feature upgrades in each one.

Let’s take a look at the 5 most significant features that arrived in ES9; and see the ones you missed.

1. Async generation and iteration

Async generators was a powerful one from ES9.

Just like normal generators but now it pops out the values after asynchronous work like a network request or something:

So when we call .next() we'll get a Promise:

It’s such a powerful tool for streaming data in web app in a structured + readable manner — just look at this function that buffers and streams data for a video-sharing app like YouTube: