Type Alias OptionalTypeGuard<T>

OptionalTypeGuard: UnionTypeGuard<[undefined, T]> & { unbox(): TypeGuard<T> }

A TypeGuard for T | undefined.

Returned by isOptional and TypeGuard.optional.

Type Parameters

T
The base type that may be undefined

Type Declaration

unbox: function
- unbox(): TypeGuard<T>
  Returns the underlying type guard for T (without undefined)
  
  Returns TypeGuard<T>
  - Defined in isOptional/index.ts:13