types-kit.uniontotuple.md

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UnionToTuple type

Convert union type to a tuple.

Signature:

export type UnionToTuple<U> = [U] extends [never] // no type
  ? []
  : [...UnionToTuple<Exclude<U, LastInUnion<U>>>, LastInUnion<U>]

References: UnionToTuple, LastInUnion

Example

// Expect: ['3', '1', '2']
type Foo = UnionToTuple<'3' | '1' | '2'>