Type alias RequireFields<T, K>

RequireFields<T, K>: T & {
[P in K]-?: NonNullable<T[P]>
}

Requires the specified fields K in type T.

Type Parameters

T
type to require fields in
K extends keyof T
fields to require

Returns

a type with the specified fields required

Example

type Example = { a?: number, b?: string }
type RequiredFields = RequireFields<Example, 'a'> // { a: number, b?: string }
type RequiredFields = RequireFields<Example, 'a' | 'b'> // { a: number, b: string }

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