Updates the quantity of one or more line items in a cart.
This method is only for updating the quantity of line items. To entirely remove a line item from the cart, use Remove Line Items. To add a new line item to the cart, use Add To Cart.
This method checks the amount of stock remaining for this line item. If the specified quantity is greater than the remaining stock, then the quantity returned in the response is the total amount of remaining stock.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.