notificaçoes

test_nif.js

@@ -0,0 +1,15 @@
+function validarNIF(nif) {
+    nif = nif.replace(/\s+/g, '');
+    if (!/^\d{9}$/.test(nif)) return false;
+    if (nif.charAt(0) === '0') return false;
+    let soma = 0;
+    for (let i = 0; i < 8; i++) {
+        soma += parseInt(nif.charAt(i), 10) * (9 - i);
+    }
+    const resto = soma % 11;
+    const digitoControlo = (resto === 0 || resto === 1) ? 0 : (11 - resto);
+    return digitoControlo === parseInt(nif.charAt(8), 10);
+}
+console.log(validarNIF('509442013')); // valid NIF (e.g. some company)
+console.log(validarNIF('213340058')); // valid random
+console.log(validarNIF('200000000')); // invalid