Function isNaturalNumberString

isNaturalNumberString(input): Validated<number>

Validate a natural number string

Parameters

input: unknown
The raw input

Returns Validated<number>

Example

isNaturalNumberString("1") >>
    {
      valid: true,
      parsed: 1,
    };

  isNaturalNumberString("") >>
    {
      valid: false,
      error: 'Not a number: ""',
    };

  isNaturalNumberString("0.5") >>
    {
      valid: false,
      error: 'Not an integer: "0.5"',
    };

  isNaturalNumberString("0") >>
    {
      valid: false,
      error: 'Not a natural number: "0"',
    };