Responsive Image Lazy Load JS Library – lazysizes
lazysizes is an easy yet robust JS library used to delay the loading of images (iframes, scripts, etc) until they come into view.
JavaScript & CSS lazy load
Small Image Lazy Loader – yall.js
yall.js is a really small JavaScript library to lazy load images as the users scroll through your content heavy webpage. Supports srcset attribute and picture element.
Web Preloader & Lazy Loader Library – Loader
Loader is a powerful JavaScript library used to preload or lazy load ‘Heavy’ HTML elements on the webpage, such as images, audios, videos, iframes, and etc.
Load Youtube Video Only When Needed – Youtube LazyLoad
Yet another Youtube lazy loader that delays the loading of Youtube video player to improve the performance of your web page.
Performant Element lazy Load Library – Lozad
Lozad is a small, highly performant JavaScript library used to lazy load any html elements (e.g. images, videos, etc.) using Intersection Observer Web API.
Animated Image Lazy Loader With Broken Image Fallback – rogano-lazy
rogano-lazy is a modern image lazy loader written in pure JavaScript without any 3rd dependencies.
Defer Loading Of Images And CSS Classes & Styles Using JavaScript – safe-defer.js
safe-defer.js is an SEO-friendly JavaScript lazy load library that has the ability to defer the loading of images, CSS classes, and inline CSS styles to improve your page load time.
Intersection Observer Based Image Lazy Load Library – io-lazyload
io-lazyload is an extremely fast JavaScript library for lazy loading images that uses IntersectionObserver API to handle image position detection.
Pure JavaScript Library For Lazy Loading Images – lazyload.js
lazyload.js is a stand-alone JavaScript library for lazy loading images without any dependencies.
Flexible Image Lazy Loader – kit.lazy.js
kit.lazy is a small, simple image lazy loading library that supports image tag, background image, and asynchronous images loading.