Shouldn't Array.isArray narrow the type to `unknown[]`?

[Faithfinder]

lib Update Request

Configuration Check

My compilation target is whatever and my lib is the default.

Missing / Incorrect Definition

Array.isArray()

Sample Code

function parseUnknown(value: unknown): Whatever {
  if (Array.isArray(value) {
    // value is suddenly `any[]` even though I've only confirmed that it's an array
  }
}

I might be missing other usecases, but seems like Array.isArray typing should be smarter than just is any[]

[MartinJohns]

Array.isArray predates unknown and this would be a heavy breaking change.

See #33700.

[Faithfinder]

I saw these issues before creating this ticket, yeah. Seems like what's wanted there is some really smart behaviour, but I'm just saying that a simple unknown suits the function better.

If this is so much of a breaking change, introducing it or not is your call, but my proposal doesn't seem like a duplicate to me, just because it's less than other opened issues.

[MartinJohns]

introducing it or not is your call

Not mine, but the TypeScript teams. :-)

but my proposal doesn't seem like a duplicate to me, just because it's less than other opened issues.

What matters in terms of duplicates is the underlying issue, not your proposed solution.

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.