[alt227]

> What you're mentioning is something completely different.

I think that is because the term 'Pop-up' has changed. It used to mean the opening of a new browser window, typically smaller than the host window and floating somewhere on top.

Now it means a modal form within the same window and dom.

[The_Colonel]

I don't think this is often called "pop-up", mostly I see either popover or tooltip.

[sseagull]

Maybe by developers. But the public certainly calls them pop-ups

https://www.google.com/search?hl=en&q=%22newsletter%20pop%2D...

[antifa]

Either way those are called modals, not popovers.