Updates the quantity of one or more line items in the current site visitor's cart.
This method is only for updating the quantity of line items. To entirely remove a line item from the current cart, use the Remove Line Items From Current Cart method. To add a new line item to the current cart, use the Add To Current Cart method.
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.
Note: This method requires visitor or member authentication.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.