type-plus/ts/object/hasKey.ts

Provides additional types for TypeScript.

import type { AnyRecord } from './AnyRecord.js'

export type HasKey<T, K, Then = true, Else = false> = K extends keyof T ? Then : Else

export function hasKey<T extends AnyRecord, K extends string>(subject: T, ...keys: K[]): HasKey<T, K> {
	return !keys.some(key => !subject[key]) as unknown as HasKey<T, K>
}