Progressively Load Images & Iframes Using Plain JavaScript – ProgressiveMedia
The ProgressiveMedia is a vanilla JavaScript plugin used to loads images and iframes progressively as they’re scrolled into view.
JavaScript & CSS lazy load
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.
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.
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.
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.
Delay The Loading Of Images Until Needed – lazy-image
The lazy-image library allows to load image sources on-demand (e.g. click, in view, etc).
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.
Vanilla JavaScript Library For Image Lazy Load – vanillaLazyLoad
Yet another vanilla JavaScript library that helps delay the loading of images until they become visible in the viewport.