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How to validate BSN, PGN & OWN in the Netherlands with TypeScript/JavaScript
function elfProefValidation(value, type) {
let returnValue = false;
if (!value || value?.length === 0) {
return true;
}
if (value === '00000000000' || value.length !== 9) {
return false;
}
const values = value.split('');
const firstCharacter = parseInt(values[0], 10);
const lastCharacter = parseInt(values[values.length - 1], 10);
const [a, b, c, d, e, f, g, h, i] = values.map((char) => parseInt(char, 10));
let result = 0;
if (type === 'bsn') {
result = 9 * a + 8 * b + 7 * c + 6 * d + 5 * e + 4 * f + 3 * g + 2 * h + -1 * i;
returnValue = result > 0 && result % 11 === 0;
} else if (type === 'own') {
result = 9 * a + 8 * b + 7 * c + 6 * d + 5 * e + 4 * f + 3 * g + 2 * h;
returnValue = result > 0 && firstCharacter === 1 && result % 11 === lastCharacter + 5;
} else {
returnValue = false;
}
return returnValue;
}
export enum ElfproefType {
bsn,
own
}
function elfProefValidation(value: string, type: ElfproefType): boolean {
let returnValue = false;
if (!value || value?.length === 0) {
return true;
}
if (value === '00000000000' || value.length !== 9) {
return false;
}
const values = value.split('');
const firstCharacter = parseInt(values[0], 10);
const lastCharacter = parseInt(values[values.length - 1], 10);
const [a, b, c, d, e, f, g, h, i] = values.map((char: string) => parseInt(char, 10));
let result = 0;
if (type === ElfproefType.bsn) {
result = 9 * a + 8 * b + 7 * c + 6 * d + 5 * e + 4 * f + 3 * g + 2 * h + -1 * i;
returnValue = result > 0 && result % 11 === 0;
} else if (type === ElfproefType.own) {
result = 9 * a + 8 * b + 7 * c + 6 * d + 5 * e + 4 * f + 3 * g + 2 * h;
returnValue = result > 0 && firstCharacter === 1 && result % 11 === lastCharacter + 5;
} else {
returnValue = false;
}
return returnValue;
}
@devbyray
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devbyray commented Jan 19, 2022

How to validate BSN, PGN & OWN in the Netherlands with TypeScript/JavaScript

In the Netherlands we have a few identification numbers from the government. In this example you can I created a function to validate both of them based on the specification.

  • BSN = Burgerservice nummer
  • PGN = Burgerservice nummer in schools where the student doesn't have a BSN. The PGN is also called OWN.

How to use the code?

Define the function in your code and call it like this:

TypeScript example

// PGN/OWN
elfProefValidation('114435231', ElfproefType.own); // returns true;
elfProefValidation('34564366349', ElfproefType.own); // returns false;
// BSN
elfProefValidation('232262536', ElfproefType.bsn); // returns true;
elfProefValidation('247594057', ElfproefType.bsn); // returns false;

JavaScript example

// PGN/OWN
elfProefValidation('114435231', 'own'); // returns true;
elfProefValidation('34564366349', 'own')); // returns false;
// BSN
elfProefValidation('232262536', 'bsn')); // returns true;
elfProefValidation('247594057', 'bsn')); // returns false;

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