prefer-nullish-coalescing rule (from typescript-eslint)

[tkafka]

I used to write code with logical or in places where I actually meant nullish coalescing ??, and it took me some time to realize || is a strong code smell, after I got bitten by an error where || operator replaced 0 (which was a valid domain value) with a fallback.

To my surprise, Biome doesn't yet support prefer-nullish-coalescing rule from typescript-eslint, and so I would like to request it, and turn it on in my projects.

Thank you for considering :).

[ematipico]

That rule requires type information. Biome isn't able, yet, to inferr types

[tkafka]

Aha, thanks.

And you're right, I realized it's a red flag when used on numeric values, for me, there are valid use cases with strings. So it's not an easy problem.

[6farer]

Hi there, checking in if this can be supported in theory with v2. Thanks!

[dyc3]

Yup. Just opened #8043

[tkafka]

Thanks!