Discussion on: I Built an App That Uses All 7 New Features in JavaScript ES2020

[Alia]

I've been waiting on nullish coalescing and BigInts for a while and I'm excited it's (hopefully) coming soon.
Also, if I recall correctly, BigInts can't interoperate with regular Numbers, did the spec change?

[Tyler Hawkins]

Right?? Nullish coalescing and optional chaining have been the ones I've been most excited about.

For BigInt, you're right, you can't mix a BigInt with a normal number. So if you want to do some operation on a BitInt and a number, you need to convert one of them to the other format.

So for instance, you can't do:

const aBigInt = BigInt(100)
const aNumber = 50
const result = aBigInt + aNumber // incorrect!

But you could do:

const result = aBigInt + BigInt(aNumber)

Or:

const result = Number(aBigInt) + aNumber