Type Alias TupleOf<T, N, R>

TupleOf: R["length"] extends N ? R : TupleOf<T, N, [T, ...R]>

Builds a fixed-length tuple of N elements of type T via recursive conditional types.

Type Parameters

T
Element type repeated in each slot.
N extends number
Exact tuple length (must be a numeric literal type).
R extends unknown[] = []
Internal accumulator used during recursion; callers should omit this.

Example

type Triple = TupleOf<number, 3>;
//   ^? [number, number, number]