Update app.py

app.py

@@ -258,11 +258,22 @@ def modal_js():
             document.getElementById('checkout-summary').innerHTML = checkoutSummary;
             document.getElementById('cart-modal').style.display = 'none';
             document.getElementById('checkout-page').style.display = 'block';
+
+            // Clear cart after submission
+            cart = [];
+            totalCartCost = 0;
+            updateCartButton();
+            updateCartTotalCost();
         }
         function goBackToMenu() {
             document.getElementById('menu-page').style.display = 'block';
             document.getElementById('cart-modal').style.display = 'none';
         }
+        // Reset all selected add-ons when opening a new item modal
+        function resetAddOns() {
+            const checkboxes = document.querySelectorAll('input[name="biryani-extra"]');
+            checkboxes.forEach(checkbox => checkbox.checked = false);  // Uncheck all add-ons
+        }
     </script>
     """
     return modal_script