preload
Load images, scripts and CSS with XHR progress events where supported
astro-preload
Download images at build time! Supports Iconify icons and arbitrary images.
preload-it
A tiny 1kb JavaScript library for preloading assets on the browser via XHR2. It provides the ability to load assets of different file types and composite progress events.
lazzy
Modern and lightweight lazy loading library
canvas
Canvas graphics API backed by Cairo
