Updates the quantity of 1 or more line items in a cart.
The updateLineItemsQuantity() function returns a Promise that resolves when the quantities of the specified cart's line items are updated.
This endpoint is only for updating the quantity of line items. To entirely remove a line item from the cart, use removeLineItems(). To add a new line item to the cart, use addToCart().
This endpoint 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: After a cart is updated, call Refresh Cart to update the cart's UI elements and trigger the Cart Updated event.
Cart ID.
Line item IDs and their new quantity.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.