Typescript 选择多个键

Question

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

type PickMultiple = ..... //todo

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

如何提取多个密钥？它与Pick Child key

当然Pick<A, 'a'| 'b'> 不能按预期工作

Answer 1

已经支持多键了

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

Answer 2

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

type Picked<T, K extends keyof T> = T[K]

const a: Picked<A, 'a' | 'b'> = {
  name: '1',
  age: 18,
}
console.log(a)