Checkout

Recipes for the cart and checkout flows, from the first line item to a placed order.

Cart

Understand why every cart write returns the whole recalculated cart, the shared cart state behind useCart, the line item operations, and the errors map a 2xx response can carry.

Checkout and Order Placement

Understand why the shipping and payment method lists are recalculated on every change, how a method selection is a context patch, what the order request actually carries, and why the cart is gone afterwards.