@robinbobin/mimetype-constants/dist/js/src/typeGroups/types.d.ts

Extensible MIME constants with typescript support

type TSubtypeGroup<TSubtype extends string> = Readonly<Record<TSubtype, string>>;
type TTypeGroup<TType extends string, TSubtype extends string> = Readonly<Record<TType, TSubtypeGroup<TSubtype>>>;
export type { TSubtypeGroup, TTypeGroup };