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webshrine / stdtyp/src / PickByValueExact

Type Alias: PickByValueExact<T, ValueType> ​

PickByValueExact<T, ValueType>: Pick<T, { [Key in keyof T]-?: [ValueType] extends [T[Key]] ? [T[Key]] extends [ValueType] ? Key : never : never }[keyof T]>

PickByValueExact

Type Parameters ​

• T

• ValueType

Desc ​

From T pick a set of properties by value matching exact ValueType.

Example ​

ts
type Props = { req: number; reqUndef: number | undefined; opt?: string; };

  // Expect: { req: number }
  type Props = PickByValueExact<Props, number>;
  // Expect: { reqUndef: number | undefined; }
  type Props = PickByValueExact<Props, number | undefined>;

Defined in ​

node_modules/.pnpm/utility-types@3.11.0/node_modules/utility-types/dist/mapped-types.d.ts:173