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PartialExcept<Original, Keys>

PartialExcept<Original, Keys> = Partial<Omit<Original, Keys>> & Required<Pick<Original, Keys>>

Creates a type where specified keys remain required while others become optional.

Type Parameters​

Original: Original​

The original object type.

Keys: Keys extends keyof Original​

The keys that should remain required.

Since​

1.0.0

Example​

type User = {
  id: string;
  name: string;
  email?: string;
  avatar?: string;
};

// PartialExcept<User, "id" | "name">
// Results in: { id: string; name: string; email?: string; avatar?: string; }
type UserUpdate = PartialExcept<User, "id" | "name">;

const update: UserUpdate = {
  id: "123",        // Required (kept as required)
  name: "John",     // Required (kept as required)
  // email and avatar are optional (became optional)
};