Type alias: PickByValue<T, V>

PickByValue<T, V>: { [P in keyof T]: T[P] extends V ? P : never }[keyof T] & keyof T

Gets all the keys (as a string union) from a type T that match value V

Example

interface Sample {
	id: string;
	name: string | null;
	middleName?: string;
	lastName: string;
	hobbies: readonly string[];
}

type BB = PickByValue<Sample, string>;
// Expected:
// "id" | "lastName"

Type parameters

Type parameter
T
V

Source

lib/types.ts:127