Pull To Refresh Library With Pure JavaScript – Pull.js
Pull.js is a tiny and zero-dependency JavaScript library that provides pull to refresh & pull to load functionality for your mobile webpages.
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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.
9 Minimal CSS Loading Spinners
Yet another collection of 9 minimal loading spinners created using pure CSS/CSS3.
Image Preloader With Loaded Callback – ImagePreloader
A lightweight image preloader written in pure JS that will trigger a callback function when all the provided images are completely loaded.
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.
Fancy Progress Bars With SVG Patterns – Bars
The Bars library lets you create fancy progress bars filled with SVG patterns when processing.
Configurable Loading Spinner With Pure JS – loadingOverlay.js
loadingOverlay.js is a standalone JavaScript library to create a configurable loading spinner (overlay) with spin handles support.
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.