Type Alias $<T, $O>

$: IsUndefined.$<
T,
{ $else: Assignable.$<T, void, $O>; $then: $ResolveBranch<$O, [$Else]> },
>

🧰 type util

Validate if T is undefined.

This is a type util for building custom types. It does not check against special types.

Type Parameters

T
$O extends IsVoid.$UtilOptions