How to continuously add to Shopping cart when [Product].[AllowedQuantities]=1

Is it possible to continuously  click "add to cart"  and auto add to mini shopping cart without any entering the product content and pressing add to cart again?

I tested again in a different way ,That I switched the database to the original one and then simply added 2 products.  And it was ok to add to cart continuously again,
So my original code was fine. It must be some setting or record that caused the logic change. !!

I think I found the reason, because we set [Product].[AllowedQuantities]=1, so after clicking Add to Cart, it will not be directly put into the shopping cart!!

Because the Product is digital course  so the quantity will never exceed 1. Customers want to purchase quickly. How should we solve this problem?

I am currently rewriting the code at the judgment point and it can be easily solved. .