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.
The Bars library lets you create fancy progress bars filled with SVG patterns when processing.
loadingOverlay.js is a standalone JavaScript library to create a configurable loading spinner (overlay) with spin handles support.
kit.lazy is a small, simple image lazy loading library that supports image tag, background image, and asynchronous images loading.
The lazy-image library allows to load image sources on-demand (e.g. click, in view, etc).
SpinThatShit is a set of 12+ pure CSS single element loading spinners which can be used to indicate the content loading status in an elegant way.
lazyembed.js is a lazy loading library for iframe embedded content such as Youtube/Vimeo videos, Google Maps, etc. The library delays the loading of these iframe content until clicked, with custom placeholder support.
Yet another vanilla JavaScript library that helps delay the loading of images until they become visible in the viewport.
A modern, fast, lightweight image lazy load JavaScript library that provides 2 methods to lazy load images with support for retina and responsive images.
mk-spinners is a fresh new collection of cool animated loading indicators/spinners created by pure CSS/SASS.