rut maximo caracteres

templates/login.html

@@ -26,6 +26,7 @@
                                 name="rut"
                                 id="rutInput"
                                 placeholder="12.345.678-9"
+                                maxlength="12"
                                 required
                                 autofocus>
                         </div>
@@ -45,6 +46,11 @@
     <script>
     document.getElementById('rutInput').addEventListener('input', function(e) {
         let value = this.value.replace(/[^0-9kK]/g, '').toUpperCase();
+        
+        if (value.length > 9) {
+            value = value.slice(0, 9);
+        }
+
         if (value.length > 1) {
             let body = value.slice(0, -1);
             let dv = value.slice(-1);