Function either

either<T, U>(first, second): Validator<T | U>

Combine two validators with a logical OR

Type Parameters

T
The first validated type
U
The second validated type

Parameters

first: Validator<T>
The first validator
second: Validator<U>
The second validator

Returns Validator<T | U>

Example

const isStringOrNull = either(isString, isNull);

  isStringOrNull("") >>
    {
      valid: true,
      parsed: "",
    };

  isStringOrNull(null) >>
    {
      valid: true,
      parsed: null,
    };

  isStringOrNull(1) >>
    {
      valid: false,
      error: "Not a string: 1",
    };