Function propOrUndef

Returns (<K>(key) => ((x) => undefined | WithoutOptValues<T[K]>))

• • <K>(key): ((x) => undefined | WithoutOptValues<T[K]>)

  • Type Parameters

    • K extends string | number | symbol

    Parameters

    • key: K

    Returns ((x) => undefined | WithoutOptValues<T[K]>)

    • • (x): undefined | WithoutOptValues<T[K]>

      • Parameters

        • x: Opt<T>

        Returns undefined | WithoutOptValues<T[K]>