Typescript Pick multiple keys

Question

interface A{
  a:{
    name: string
  }
  b:{
    age: number
  }
}

type PickMultiple = ..... //todo

const child:PickMultiple<A,['a','b']> = {
   name: 'mike',
   age: 18
}

How can I extract multiple keys? it was same as Pick Child key

Ofcourse Pick<A, 'a'| 'b'> can't work as expected

Answer 1

It already supports multiple keys

interface Todo {
  title: string;
  description: string;
  completed: boolean;
}
 
type TodoPreview = Pick<Todo, "title" | "completed">;