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.
JavaScript & CSS Lazy Load
Performant Image Lazy Loading Library – Turtle.js
A lightweight, high-performance image lazy loading library that uses Intersection Observer API to detect whether your images are visible in the viewport.
Lazy Load Image With Placeholder And Fallback – imagebuddy
imagebuddy is a pure JavaScript plugin for lazy loading images with support for custom placeholder and fallback.
Intersection Observer Based Image Lazy Load Library – io-lazyload
io-lazyload is an extremely fast JavaScript library for lazy loading images/ifames/backgrounds that uses IntersectionObserver API to handle position detection.
Progressive Image Lazy Loading Library – with-preview
with-preview is a JavaScript for modern image lazy loading effect that progressively blurs and fades in images when they’re scrolled into view.
Small Image/Video/Iframe Lazy Loader – yall.js
yall.js is a really small JavaScript library to lazy load images, videos, iframe contents and background images as the users scroll through your content-heavy webpage.
Progressive Image Loading Inspired By Medium.com – Pure Media
Pure Media is a tiny JavaScript library that applies a Medium.com like progressive loading effect to images within the document.
Modern SEO-friendly Image Lazy Load Library – leniwiec.js
leniwiec.js is a tiny JavaScript lazy load library that supports img/picture tags and background images. Powered by the Intersection Observer API.
Minimalist Image Lazy Loader Based On Intersection Observer – lzy.js
lzy.js is a small performant image & background image lazy loader built with vanilla JavaScript and the Intersection Observer API.
Accessible Image Lazy Load In Pure JavaScript – gandul.js
gandul.js is a small accessible image lazy load library that works with the a link and supports responsive image delivery.