Type alias PickExactlyByType<T, P>

PickExactlyByType<T, P>: {
[K in Keys<T> as If<Equals<T[K], P>, K, never>]: T[K]
}

From T, pick a set of properties whose type excatly matches P.

Type Parameters

T
P

Example

type OneLevelDeep = {
 foo: boolean;
 bar?: Numeric;
 baz: Nullable;
 fooBaz: bigint;
 bazFoo: string | boolean;
 seven: 7;
 aNum: number;
};
 type A = PickExactlyByType<OneLevelDeep, bigint>,
 // A results in:
   {
     fooBaz: bigint;
   },
 // Notice how it does not pick up seven
type B = PickExactlyByType<OneLevelDeep, number>,
   {
     aNum: number;
   }