1918js

what is this?

validation library for polish identifiers

features

• validation utilities for polish identifiers: NIP, PESEL, REGON
• no external dependencies
• extensive testing (unit tests, property-based tests, mutation-tests)

how to use

import { validateRegon } from "1918js"

declare const someUnknownUserInput: unknown;

const result = validateRegon(someUnknownUserInput)

if(result.ok) {
  console.log("happy path :)")
  console.log("our value: ", result.value)
}

if(!result.ok) {
  console.log("you know what path this is :(")

  // error is accessed as a value, never thrown
  console.log("error code", result.error.code)
}

learn more

documentation