- optionalField<K, VI, VO>(key, $value): $.Shape<Expand<Readonly<Partial<Record<K, VI>>>>, Expand<Partial<Record<K, VO>>>>
Type Parameters
- K extends string | number | symbol
- VI
- VO
Returns $.Shape<Expand<Readonly<Partial<Record<K, VI>>>>, Expand<Partial<Record<K, VO>>>>