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ExtractMapType

A type that extracts the generic type parameters from a Map type. It extracts K and V from a type like Map<K, V> and returns them as a tuple [K, V].


Interface​

typescript
type ExtractMapType<T> = T extends Map<infer K, infer V>
  ? [K, V]
  : never;

Usage​

Basic Case​

typescript
import { ExtractMapType } from '@modern-kit/types';

type StringNumberMap = Map<string, number>;
type Extracted = ExtractMapType<StringNumberMap>; // [string, number]

Non-Map Type​

typescript
import { ExtractMapType } from '@modern-kit/types';

type NotMap = ExtractMapType<number>; // never