We have seen this effect where there a bunch of text links on the page and on hover an image is loaded up and shown to the visitor. This snippet allows you to achieve this popup image on text link hover on your web pages.
If you are having trouble with the pen, try the archived copy on GitHub
Popup Image on Text Hover Snippet
See the Pen [Minimal Series] Presskit Download page by Daan (@danoszz) on CodePen.0