Pure JavaScript Library For Lazy Loading Images & Videos – lazyload.js
lazyload.js is a stand-alone JavaScript library for lazy loading images and videos without any dependencies.
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Text Loading Effect By Animating Characters – letterloading.js
A vanilla JavaScript library to simulate a text loading effect by animating an array of text strings.
Customizable Screen Skeleton Loader In CSS – css-skeletons.css
A CSS library to generate an animated, highly customizable skeleton preview of your web content using a single DIV.
6 Loading Animations In Pure CSS
A set of 6 pretty cool loading animations that can be used as loading spinners while loading content in the document.
Minimalist Page Load Progress Bar – nanobar
nanobar is a super tiny JavaScript library to create a custom *FAKE* page load progress bar on the top of the page.
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.
Animated Skeleton Loading Screens In Pure CSS
A CSS skeleton loader library that creates an animated skeleton preview of your block content (e.g. text, cards, images) when the data is loading.
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.
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.
126 Beautiful & Creative Loaders In CSS/CSS3
A set of 126 beautiful, creative, animated loading spinners for content loaders, page preloaders, skeleton loaders (screens).