Function isNullable

isNullable<T>(value: unknown, is: Guard<T>): value is Nullable<T>
Checks if a value is Nullable.

Absence is accepted under either marker: undefined and null pass without consulting the guard, while every other value must satisfy it. Suited to data crossing a boundary that reports absence under either convention, where the choice of marker carries no meaning.
Type Parameters
- T
  The type validated by the type guard
Parameters
- value: unknown
  The value to check
- is: Guard<T>
  A type guard function to validate the value if it is neither undefined nor null
Returns value is Nullable<T>
True if the value is undefined, null or satisfies the type guard; false otherwise
- Defined in index.ts:389