Track what's in the shopping cart

Hi guys

I’d like to track what’s in a user’s shopping cart as they navigate through the site to show validation messages and errors to make sure they don’t make a mistake.

The ecoms journey is very linear and users need to add particular products to their cart before they can add others. So knowing what’s currently in their cart is vital.

There doesn’t seem to be anything in the Webflow API about this. Could anyone point me in the right direction?

Here is my site Read-Only: LINK