How to add images and text on mouseover

I recently visited and noticed that when holding my mouse over certain links, up pops a small container including an image/photo together with relevant information. Please can anyone share how I add this feature to my own website, including links to help guides, HTML/CSS examples?

It’s a MediaWiki Extension.
Extension:Popups - MediaWiki

1 Like

Thanks for sharing this with me. I’ll go and have a read. All good wishes :slight_smile: