personal-document-generator/generators/utils/number-generator.js

A simple DNI (spanish ID document number) and NIE (id number for foreing people in spain) generators.

const lengths = {
  7: 10000000,
  8: 100000000,
};

export const getEightOrSevenDigitsNumber = (numberLength = 8) => {
  const randomNumber = parseInt(Math.random() * lengths[numberLength]);
  return randomNumber.toString().length === numberLength ? randomNumber : getEightOrSevenDigitsNumber(numberLength);
};

export const generateNumber = () => {
  const number = parseInt(Math.random() * 10);
  return number <= 2 ? number : generateNumber();
};