Pure JavaScript Library For Lazy Loading Images – lazyload.js
lazyload.js is a stand-alone JavaScript library for lazy loading images without any dependencies.
JavaScript & CSS lazy load
Delay Loading Of Iframe Embedded Content Until Clicking – lazyembed.js
lazyembed.js is a lazy loading library for iframe embedded content such as Youtube/Vimeo videos, Google Maps, etc. The library delays the loading of these iframe content until clicked, with custom placeholder support.
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.
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.
Tiny JavaScript Library For Progressive Image Lazy Loading – Progressively
Just another fast, dependency-free JavaScript library used to lazy load images with a progressive blur loading effect as you seen on Medium or Instagram.
Lazy Load iFrame Embedded Content With JavaScript – lazyframe.js
lazyframe.js is a native JavaScript library used to delay the loading of iframe content for Google Maps, Youtube/Vimeo/Vine videos and so on.
Lazy Load & Pre-cache Images To Improve Page Speed – Img2
Img2 is a web component that lazy-loads and pre-caches images to improve the page loading time.
Fast High-Performance Lazy Load Library – LazyObserver.js
Just another JavaScript library which makes uses of the Intersection Observer API to provide the fast, performant and modern lazy loading functionality on your images within the document.
Minimalist Image Lazy Loader In Pure JavaScript
A super tiny (less than 1kb) image lazy loader library without any third dependencies.
Responsive Fading Image Grid With Lazy Load
A responsive fading image grid that uses Intersection Observer to lazy load images as they scrolled into view.