import type {SetRequired} from 'type-fest';
type Foo = {
a?: number;
b: string;
c?: boolean;
};
type SomeRequired = SetRequired<Foo, 'b' | 'c'>;
// type SomeRequired = {
// a?: number;
// b: string; // Was already required and still is.
// c: boolean; // Is now required.
// }
// Set specific indices in an array to be required.
type ArrayExample = SetRequired<[number?, number?, number?], 0 | 1>;
//=> [number, number, number?]
Create a type that makes the given keys required. The remaining keys are kept as is. The sister of the
SetOptionaltype.Use-case: You want to define a single model where the only thing that changes is whether or not some of the keys are required.