Refresh ajax cart?

Question

Magento

RewriteEngine On
RewriteRule ^cart/prod([0-9]+)/$ /cart.php?id=$1
RewriteRule ^cart/prod([0-9]+)/qty([0-9]+)/$ /cart.php?id=$1&q=$2
RewriteRule ^cart/prod([0-9]+)/qty([0-9]+)/update/$ /cart.php?id=$1&q=$2&update =1

Answer 1

Just by clicking on the button, get new data on the basket and push them into it. It's standard, everyone does it.

Answer 2

Why write a bicycle?
You can take a ready-made solution, for example
, as described above, it makes no sense to update the block without adding the product to the cart.
If you want to write your own, then I recommend starting with an analysis of ready-made solutions