added function to detect customers that underage

resources/views/customers/v2/index.blade.php

@@ -1222,6 +1222,31 @@
         var id_type = $('#customerIDType').val();
         var nokp = $('#noic').val();
         if(id_type=='nokp'){
+            const date = nokp.substring(0, 6);
+            const year = parseInt(date.substring(0, 2), 10);
+            const month = parseInt(date.substring(2, 4), 10) - 1;
+            const day = parseInt(date.substring(4, 6), 10);
+
+            const cutofYear = 10;
+
+            const fullYear = year < cutofYear ? 2000 + year : 1900 + year;
+            const dateconvert = new Date(fullYear, month, day);
+            const today = new Date();
+
+            const eighteenthBirthday = new Date(dateconvert);
+
+            eighteenthBirthday.setFullYear(dateconvert.getFullYear() + 18);
+
+            if (today < eighteenthBirthday) {
+                    Swal.fire({
+                        icon: 'error',
+                        title: 'Amaran!',
+                        text: 'Pelanggan Ini Dibawah Umur!'
+                    });
+                    event.preventDefault();
+                    return false;
+            }
+
             if($.isNumeric(nokp) == false){
                 if(nokp.substr(-1) != '*')
                 {