6 sessions
Damilola Afolabi
Northwind Storefront Checkout Refresh
Reported24m 0s
CriticalFunctionalitySubmitted 9/1/2026, 9:27:40 AM
Order total breaks after applying a promo code
Applying PROOF10 at checkout throws a TypeError and the order total renders as $NaN. Confirmed via console error and the failed /api/cart/apply-promo request.
Session log
- 09:02:10 AMnavigation
Opened /checkout
- 09:05:44 AMinteraction
Applied promo code PROOF10
- 09:06:02 AMconsole
TypeError: Cannot read properties of undefined (reading 'total')
checkout-summary.js:118
- 09:11:30 AMnetwork
POST /api/cart/apply-promo → 500
- 09:18:12 AMnote
Order total shows $NaN after promo applied