Introducing Popbox
Popbox is a lightweight, unobtrusive script for displaying images in a Web page. Written entirely in JavaScript and CSS, Popbox weighs in at just 5.8 kb, and relies on no external dependencies. Popbox was designed as a smaller, simpler replacement for other image presentation scripts such as Lightbox, Slimbox, and FancyZoom.
Setup is a snap. All you have to download is the script
and the CSS. Include the script in the head of your document,
and add data-popbox="popbox" to links you want to open with Popbox.
Popbox has been tested in Chrome, Firefox, Safari, and Edge.
Popbox is free software released under a Creative Commons license.