Any Resources Preloader JavaScript Library – Loader.js
Loader.js is a pure JavaScript preloader that preloads web resources (text, JSON, images, audios, videos, etc) and triggers certain events while loading and after loaded.
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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.
Dynamic Content Loading Using Fetch API – pill.js
pill.js is an ultra-lightweight JavaScript library to make your webpage behavior like the native app by dynamically loading content into the current webpage using Fetch API.
Minimal SVG Loading Spinner In Pure JS – LoadingSpinner.js
A vanilla JavaScript plugin to show a basic, animated, SVG-based loading spinner on the screen when needed.
Delay The Loading Of Anything With Defer.js
Defer.js is a small and lightweight JavaScript library that delays the loading of web resources to improve page speed.
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.
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.
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.
Replace Favicon With A Loading Indicator In The Browser Tab – favloader
favloader is a vanilla JavaScript plugin that replaces the favicon with a customizable loading spinner when needed.