MaybeFieldTree - Angular

Helper type for defining FieldTree. Given a type TValue that may include undefined, it extracts the undefined outside the FieldTree type.

API

type MaybeFieldTree<TModel, TKey extends string | number = string | number> = | (TModel & undefined)
  | FieldTree<Exclude<TModel, undefined>, TKey>

Helper type for defining FieldTree. Given a type TValue that may include undefined, it extracts the undefined outside the FieldTree type.

For example MaybeField<{a: number} | undefined, TKey> would be equivalent to undefined | FieldTree<{a: number}, TKey>.