miroswd

const validateCPF = (cpf: string): boolean => {
  if (!cpf) return false;

  const onlyNumbersCPF = cpf.replace(/[^\d]+/g, "");

  const invalidCPFs = Array.from("0123456789").map((i) => i.repeat(11));

  if (onlyNumbersCPF.length !== 11 || invalidCPFs.includes(onlyNumbersCPF)) {
    return false;
  }

miroswd

const validateCNPJ = (cnpj: string): boolean => {
  if (!cnpj) return false;

  const onlyNumbersCNPJ = cnpj.replace(/[^\d]+/g, "");

  const invalidCNPJs = Array.from("0123456789").map((i) => i.repeat(14));

  if (onlyNumbersCNPJ.length !== 14 || invalidCNPJs.includes(onlyNumbersCNPJ)) {
    return false;
  }