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.
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Easy Pull To Refresh Library With Pure JavaScript – pulltorefresh.js
pulltorefresh.js is a lightweight, customizable JavaScript library that adds the pull to refresh functionality to your webpages using pure JavaScript.
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.
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.
Preload Specified Assets Using XHR2 – preload-it
The preload-it library preloads & prefetches assets (e.g. videos, audios, etc) using XMLHttpRequest to optimize the loading speed of your webpage.
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.
Fancy Progress Bars With SVG Patterns – Bars
The Bars library lets you create fancy progress bars filled with SVG patterns when processing.