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, TMode extends 'writable' | 'readonly' = 'writable'> = (TModel & undefined) | FieldTree<Exclude<TModel, undefined>, TKey, TMode>

Description

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

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