Function isUndefined

isUndefined(input): Validated<undefined>

Validate an input is undefined

Parameters

input: unknown
The raw input

Returns Validated<undefined>

Example

isUndefined(undefined) >>
    {
      valid: true,
      parsed: undefined,
    };

  isUndefined(null) >>
    {
      valid: false,
      error: "Not undefined: null",
    };