Type Alias $<T, $O>

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