# Check your learning

Zen Electron's development team is refining the gift registry feature. A junior developer, Alex, has been assigned a task. A registered customer (`customerId: "cust-abc-123"`) is viewing their existing "Wedding Registry" list (`shoppingListId: "reg-xyz-789", version: 3`). The customer wants to perform two actions simultaneously:

- Add a specific Espresso Machine (`productId: "coffee-master-5000", variantId: 1`) to the registry with a quantity of 1.
- Add a note for guests with the value of `"Please include a gift note!"`.

Alex needs to write the TypeScript SDK code to update the Shopping List in a single API call.

## Next module

Great work on finishing the Implement Shopping Lists module! You're now ready for the next module - Manage sign-ups and sign-ins. See you there!

Learn how to manage the complete Customer authentication lifecycle with commercetools.

## Related pages

- [Area overview page with navigation](/learning-implement-carts-and-shopping-lists.md)
- [Previous page: Best practices](/learning-implement-carts-and-shopping-lists/implement-shopping-lists/best-practices.md)
- [Search documentation and API specs](/search.md)