Welcome to the wonderful world of affiliate marketing, adtech, and tag management.
In that world, third party ‘tags’ that are included in a page are generally referred to as ‘pixels’. Sometimes they are single pixel img tags. Frequently they are scripts. But the industry calls them ‘pixels’ anyway.
It is, surprisingly, not a terribly honest industry.
I don't know why you're being downvoted, calling full access javascript embedded into a page a 'tracking pixel' is a total lie. Then again 'serverless' is where you use a server, so the track record isn't great.
I guess most people reading this already knew that the term 'tracking pixel' has evolved beyond its original meaning, and is now commonly understood to include all sorts of tracking code.
I did not, but now I know :)
(And although serverless doesn't mean 'no server', we know what the word means and it doesn't cause confusion.)
In that world, third party ‘tags’ that are included in a page are generally referred to as ‘pixels’. Sometimes they are single pixel img tags. Frequently they are scripts. But the industry calls them ‘pixels’ anyway.
It is, surprisingly, not a terribly honest industry.