Type alias DeepPick<T, P>

DeepPick<T, P>: UnionToIntersection<P extends `${infer K}.${infer R}`
    ? {
        [K1 in K]: DeepPick<T[K1], R>
    }
    : P extends Keys<T>
        ? Pick<T, P>
        : never>

Deeply pick properties from a nested object type.

Type Parameters

  • T extends Record<string, any>

    The target object.

  • P extends string

    A dot-separated string literal representing the path of properties to pick.

Example

type T = {
 one: string;
 two: {
   a: boolean;
   b: null;
   c: 'c' | 'C';
 };
 thee: number;
};
DeepPick<T, 'two.c'> // Results in:
{
   two: {
     c: 'c' | 'C';
   };
 }

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