Validate if a CPF is valid

Validate if a CPF is valid

/**
 * Validate if a CPF is valid.
 * @param {String} data - CPF
 * @param {Array} cpfBlackList - Array with balcklist of wrongs CPFs
 * @returns {Boolean} return an boolean.
 *
 * @example
 * isCpfValid('07102325364'); // false
 */
export const isCpfValid = (
  data = '',
  cpfBlackList = [
    '00000000000',
    '11111111111',
    '22222222222',
    '33333333333',
    '44444444444',
    '55555555555',
    '66666666666',
    '77777777777',
    '88888888888',
    '99999999999',
  ],
) => {
  const isDigitValid = (digit = 1) => {
    const index = digit === 1 ? 9 : 10;

    let amount = 0;
    for (let i = 0; i < index; i++) amount += parseInt(cpf.charAt(i)) * (index + 1 - i);

    const rest = 11 - (amount % 11);
    if (!(rest === 10 || rest === 11) && rest !== parseInt(cpf.charAt(index))) return false;
    return true;
  };

  const cpf = data.replace(/[^\d]+/g, '');
  if (!cpf || cpf.length !== 11 || cpfBlackList.find(current => cpf === current)) return false;

  return isDigitValid(1) && isDigitValid(2);
};