Can I implement custom "Delivery to Point" widget/provider?

I’m trying to integrate the Slovak Post Widget into my Wix store, but I can’t figure out how to customize the checkout page to make it work properly.

The widget needs to be embedded into the checkout page with a script tag like this:

<html>
	<head>
		...
		<script
			src="``https://static.posta.sk/pickup-widget/v1/lib.js``"
			type="text/javascript"
		></script>
	</head>
	...
</html>

Here’s what the checkout page should allow the customer to do:

  1. Open the widget by clicking a button.
  2. Select a preferred delivery point.
  3. Pass the selected point into the order details (via the JS callback provided by the widget).
  4. Use that point as the delivery address for the order.

So far, I’ve managed to add the script tag to the header using the ‘Custom Code’ option in Wix settings. However, I still need a way to:

  • Render a button conditionally, based on the chosen shipping provider.
  • Load the selected delivery point into the order details as the delivery address.

My question is:
Is it possible to fully integrate a 3rd-party delivery point widget into the Wix checkout page?

Demo of the widget

For something like this, you would need to integrate it into the business solution as stated here: Integrate with Wix's Business Solutions

If you need assistance as it can pretty complex to create a checkout flow, you can look into hiring a Wix Partner here.