Thread by @SimonHoiberg

JavaScript ES2021 🚀
It's here!!

Are you up to speed with some of the cool new features we got in ES2021?

Let's take a look 👇🧵

JavaScript ES2021 (or ES12) - was published in June 2021 and introduces some cool new features to the JavaScript language.

Should you care?!

Well, it's not groundbreaking (like ES6), but it does introduce some features that you should familiarize yourself with.

Let's dive in!

🔸 String.prototype.replaceAll()

The current 'String.prototype.replace()' method only replaces the first occurrence, unless a regular expression with a global modifier is provided.

With the new 'String.prototype.replaceAll()' method, we can finally omit the regex 👇

🔸 Private Methods

When a method name starts with '#', we declare them private.
Private methods can only be accessed from within the class they're defined 👇

🔸 Private Accessors

Similar to Private Methods, accessor functions can be made private by prepending # to the function name as well 👇

🔸 Promise.any()

You probably already know how to use 'Promise.all()' to await all Promises from a list to resolve.

With Promise.any(), we can await a list of Promises, but resolve as soon as one of the Promises in the list resolves 👇

🔸 Logical Assignment Operator (&&)

The new Logical Assignment Operator combines logical operations (&& / || / ??) with assignments.

Let's take a look below, using && 👇

🔸 Logical Assignment Operator (||)

Similarly, we can use the new Logical Assignment Operator with || 👇

🔸 Logical Assignment Operator (??)

Finally, we can use it in combination with the Nullish Coalescing Operator 👇

There are two additional new features, 'WeakRef' and 'Finalizers', which are a bit too complex to explain here.
But I highly recommend looking them up!

What do you think of these new features? 🤩
Will you be using them?

Share your thoughts below.

If you're using ESNEXT in your projects, you're probably already using some of these. I think they are really cool 🙌

I hope you enjoyed reading!

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Thank you 🙏