TupleToUnion<T>

Overview

Convert a array/tuple into a union type of its elements.

Syntax

type TupleToUnion<T> = T extends readonly unknown[] ? T[number] : never;

• T: The array/tuple type to convert.

Example

type T0 = TupleToUnion<['a', 'b', 'c']>; // 'a' | 'b' | 'c'
type T1 = TupleToUnion<[1, 'a', true]>; // 1 | 'a' | true
type T2 = TupleToUnion<[{ key: 'value1' }, { key: 'value2' }]>; // { key: "value1";} | { key: "value2";}