Type Alias MappedIntersection<A, B>

Given an object, and a string array containing one or more of that object's property names, construct a new type that is the intersection of each property value. This allows for the selective build-up of types for situations like REST APIs with an include or similar argument that will furnish extra data in the response.

type Book = {
  title: String;
  published: string;
};

type OptionallyIncluded = {
  author: {
    author: {
      name: string;
    };
  };

  translations: {
    translations: {
      iso: string;
    };
  };
};

type Response = Book & MappedIntersection<['author'], OptionallyIncluded>;
// => { title: string; published: string } & { author: { name: string; } };
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