libjs-blazy - 1.8.2+dfsg-2 main

bLazy is a lightweight script for lazy loading and multi-serving
images, iframes, videos and more (less than 1.4KB minified and
gzipped). It’s written in pure JavaScript why it doesn’t depend on
3rd-party libraries such as jQuery. It lets you lazy load and
multi-serve your images so you can save bandwidth and server
requests. The user will have faster load times and save data usage if
he/she doesn't browse the whole page.