Lozad.js
🔥 Highly performant, light ~0.9kb and configurable lazy loader in pure JS with no dependencies for responsive images, iframes and more
RequireJS
A file and module loader for JavaScript
Px Loader
PxLoader is a simple JavasScript library for creating preloaders and resource downloaders for HTML5 apps.
Sea.js
A Module Loader for the Web
Lazyload
Tiny, dependency-free async JavaScript and CSS loader.
Oc Lazy Load
Load modules on demand (lazy load) in AngularJS
Script.js
Asyncronous JavaScript loader and dependency manager
Blazy
bLazy is a lightweight lazy loading and multi-serving image script. It's written in JavaScript why it doesn't have any dependencies for 3rd party libraries like jQuery. bLazy is working in all modern browser including IE7+.
LABjs
Loading And Blocking JavaScript: On-demand parallel loader for JavaScript with execution order dependencies
Aload
Loads images, scripts, styles, iframes, videos and audio asynchronously.
Imagesloaded
JavaScript is all like "You images done yet or what?"
Pilpil
Pilpil - Progressive Image Loading
Almond
A minimal AMD API implementation for use after optimized builds
Lazysizes
High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.
Webpack
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.
jQuery Pjax
pushState + ajax = pjax
Queue
Yet another asynchronous helper library for JavaScript. 387 bytes minified and gzipped!