Type Alias DeepRequired<T, P>

DeepRequired: T extends unknown[]
    ? T
    : T extends Record<string, unknown>
        ? Pick<T, Extract<keyof T, P[0]>> & Required<
            {
                [K in Exclude<keyof T, P[0]>]: NonNullable<
                    DeepRequired<T[K], ShiftUnion<K, P>>,
                >
            },
        >
        : T

A type that recursively makes each property of T required. Optionally excluding a nested path specified by a list of keys.

Type Parameters

T
P extends string[]

Example

type Foo = { a?: { c?: number }, b?: string };
type Bar = { foo: Foo };
type Baz = DeepRequired<Bar, []>; // { foo: { a: { c: number }, b: string } }
type Baz = DeepRequired<Bar, ['a', 'c']>; // { foo: { a: { c?: number }, b: string } }
type Baz = DeepRequired<Bar, ['a'] | ['b']>; // { foo: { a: { c?: number }, b?: string } }

Type Alias DeepRequired<T, P>

Type Parameters

Example

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