Is it possible to require only some specified key in an object using type mapping and conditional type?

Question

There is a type from a 3rd party:

interface UpdateRequest {
  data?: ValueRange[];
  options?: Options
}

I want to create a method with th

Answer 1

You can use Pick and Required and intersect back with the original type to get back the other optional properties

type RequireSome<T, K extends keyof T> = Required< Pick<T, K>> & T;