import type {SetNonNullable} from 'type-fest';
type Foo = {
a: number | null;
b: string | undefined;
c?: boolean | null;
};
// Note: In the following example, `c` can no longer be `null`, but it's still optional.
type SomeNonNullable = SetNonNullable<Foo, 'b' | 'c'>;
//=> {a: null | number; b: string; c?: boolean}
type AllNonNullable = SetNonNullable<Foo>;
//=> {a: number; b: string; c?: boolean}
Create a type that makes the given keys non-nullable, while keeping the remaining keys as is.
If no keys are given, all keys will be made non-nullable.
Use-case: You want to define a single model where the only thing that changes is whether or not some or all of the keys are non-nullable.