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.
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.
RequireJS
A file and module loader for JavaScript
jQuery Pjax
pushState + ajax = pjax
Lozad.js
🔥 Highly performant, light ~0.9kb and configurable lazy loader in pure JS with no dependencies for responsive images, iframes and more
Sea.js
A Module Loader for the Web
Imagesloaded
JavaScript is all like "You images done yet or what?"
Java Script Load Image
JavaScript Load Image is a library to load images provided as File or Blob objects or via URL. It returns an optionally scaled and/or cropped HTML img or canvas element. It also provides a method to parse image meta data to extract Exif tags and thumbnails and to restore the complete image header after resizing.
Oc Lazy Load
Load modules on demand (lazy load) in AngularJS
Layzr.js
A small, fast, modern, and dependency-free library for lazy loading.
Head js
The only script in your HEAD. Head JS loads JavaScript files in parallel like images without blocking the page. Your page will be faster. Even with a single combined file.
Script.js
Asyncronous JavaScript loader and dependency manager
Nanobar
Very lightweight progress bars. No jQuery
Almond
A minimal AMD API implementation for use after optimized builds
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
Lazy Load Xt
Lazy load XT is a jQuery plugin for images, videos and other media