Finnish business id and vat number validator/generator

• A micro library for validating and creating Finnish business ids (y-tunnus, alv-numero)
• Lightweight, less than 10kb
• No dependencies
• Written in Typescript, typescript types available out-of-the-box

Installation

# NPM
npm install finnish-business-ids --save

# yarn 
yarn add finnish-business-ids

Usage

Node.js

Javascript

const { FinnishBusinessIds } = require('finnish-business-ids')

const validId = FinnishBusinessIds.isValidBusinessId('2617416-4')
console.log('validId:', validId)

Typescript

import { FinnishBusinessIds } from 'finnish-business-ids'

const validId: boolean = FinnishBusinessIds.isValidBusinessId('2617416-4')
console.log('validId:', validId)

Examples

• Typescript examples
• Javascript examples

Functions

isValidBusinessId(businessId: string) : boolean

• Validates parameter given business id (y-tunnus), format: 1234567-8

isValidVatNumber(vatNumber: string) : boolean

• Validates parameter given Finnish vat number (alv-numero), format: FI12345678

generateBusinessId() : string

• Generates a random Finnish business id

generateVatNumber() : string

• Generates a random Finnish vat number

calculateChecksum(idNumbers: string) : number

• Calculates checksum for parameter given business id without checksum, format: 1234567

Changelog

CHANGELOG

Building

# Build a distributable minified library
npm run dist

# Run linter
npm run lint

# Run tests
npm run test

Release a new version

• npm run dist
• Update version number in package.json. Follow semantic versioning
• npm publish

License

MIT License