Typeutilsv0.8.6-next.0

UnknownArray

Represents an array with unknown value.

Use case: You want a type that all arrays can be assigned to, but you don't care about the value.

type UnknownArray = readonly unknown[];

import type {UnknownArray} from 'type-fest';

type IsArray<T> = T extends UnknownArray ? true : false;

type A = IsArray<['foo']>;
//=> true

type B = IsArray<readonly number[]>;
//=> true

type C = IsArray<string>;
//=> false

 Type   Array

Typeutilsv0.8.6-next.0

UnknownArray

Represents an array with unknown value.

Use case: You want a type that all arrays can be assigned to, but you don't care about the value.

type UnknownArray = readonly unknown[];

import type {UnknownArray} from 'type-fest';

type IsArray<T> = T extends UnknownArray ? true : false;

type A = IsArray<['foo']>;
//=> true

type B = IsArray<readonly number[]>;
//=> true

type C = IsArray<string>;
//=> false

 Type   Array