What would code look like?

Hi! Hopefully you’re still checking your messages here. I really like the idea of this plugin as my woocommerce product pages are set to only allow 1 item and if it’s the same item you go back to, an error will popup. My problem is if I only have 1 item in my ‘store’ there is no clear cart option, so this could work. However, while I can access html, I’m not sure what the code should look like.. Could you provide sample code that I could modify?