Type Alias IsUnknown<T>

IsUnknown: IsAny<T> extends true
? false
: unknown extends T ? T extends {} ? false : true : false

Type guard: detect unknown (excluding any).

Type Parameters

T
Type to test

Remarks

Differentiates unknown from any and from concrete types by combining constraint checks with an explicit any exclusion.

Example

type A = IsUnknown< unknown >; // true
type B = IsUnknown< any >;     // false
type C = IsUnknown< string >;  // false