DeepPartial
Recursively makes all properties of a type optional.
Unlike Partial<T>, this applies to nested objects as well.
Example
type User = {
id: number;
profile: { name: string; email: string };
};
// All fields optional, even nested ones:
// { id?: number; profile?: { name?: string; email?: string } }
type UserDeepPartial = DeepPartial<User>;