Why does the OC add to cart button fire?

Question

opencart

I decided to connect Bootstrap 4 to the default theme on Opencart 3.0.
It seems that everything has become normal, but complications with ajax began to arrive. Such as adding products to the cart, to favorites, to comparisons and similar. With what it can be connected?

Answer 1

Bootstrap 4 includes jquery slim, it doesn't have ajax.
Include the full version of jquery instead