pushState + ajax = pjax
PxLoader is a simple JavasScript library for creating preloaders and resource downloaders for HTML5 apps.
Pilpil - Progressive Image Loading
🔥 Highly performant, light ~0.9kb and configurable lazy loader in pure JS with no dependencies for responsive images, iframes and more
Loads images, scripts, styles, iframes, videos and audio asynchronously.
A minimal AMD API implementation for use after optimized builds
A Module Loader for the Web
Very lightweight progress bars. No jQuery