Has anyone yet implemented (or know how to implement) Product View in Google enhanced e-commerce for a Product Detail Page whcih has multipe variations from whcih to select, and which does not load a unique new page per variation selected?

Specifically, when a website has a product detail page whcih allows the customer to select from multiple variations (sizes/colors), and upon selection does not reload the page.

I am trying to determine how to send data from the website to the data layer to support this, for a future change coming to our website where we will have product pages housing multiple variations without reloading upon selection. We currently only send the data layer upon the page load, which would be with the default variation. But if the customer changes variations, should we pass a new variation value, and if so, how? What's the typical approach for this?