SetIsSubset

Since 1.3.0

Check if one type set is a subset of another. Returns true if all elements of A are also in B.

Signature

export type SetIsSubset<A, B> = A extends B ? true : false

Parameters

Parameter	Description
A	The potential subset type set
B	The potential superset type set

Examples

Basic Usage

import type { SetIsSubset } from 'uni-types'

type Result = SetIsSubset<string, string | number | boolean>
// true

Not a Subset

type Result = SetIsSubset<string | number, string | boolean>
// false