add log file function

templates/edit_invoice.html

@@ -7,6 +7,7 @@
     <title>Edit Invoice</title>
     <link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='css/invoice.css') }}">
     <link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='css/style1.css') }}">
+
     <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
 </head>
 
@@ -204,15 +205,17 @@
                     type: "POST",
                     url: $(this).attr("action"),
                     data: $(this).serialize(),
+                    dataType: 'json',  // ensure JSON is returned
                     success: function (response) {
                         if (response.status === "success") {
-                            $("#invoiceSuccessAlert").fadeIn().delay(3000).fadeOut();
                             alert("Invoice updated successfully!");  // <-- Popup alert
-                        }
 
+                            // ✅ Redirect to Add Invoice page (table part visible)
+                            window.location.href = "{{ url_for('invoice.add_invoice') }}#addTable";
+                        }
                     },
                     error: function (xhr) {
-                        alert("Error: " + xhr.responseJSON.message);
+                        alert("Error: " + xhr.responseJSON?.message || "Something went wrong!");
                     }
                 });
             });