srcattribute of the image
yall.js is a featured-packed lazy loading script for
<iframe> elements and works with modern browsers.
Lazy loading is technique that defers loading of non-critical resources at page load time. These non-critical resources are loaded at the moment of need.
When we lazy load images and video, we reduce initial page load time, initial page weight, and system resource usage, all of which have positive impacts on performance.
Lozad.js is advanced performant Lazy Loader using Intersection Observer API.
It is written with an aim to lazy load images, ads, videos or any other element using the recently added Intersection Observer API with tremendous performance benefits.
jQuery Smartify loads images, calls Ajax, plays with css classes in on demand, while element is/or becoming visible in device Viewport. It's replacement of jQuery Lazyload.
JAIL is a jQuery plugin that lazy load images making your page load faster. Images are downloaded when they are visible or when they become visible inside the viewport
responsivelyLazy is a nice lazy loading implementation that is responsive, truly lazy and SEO friendly.
Horsey is a progressive and customizable autocomplete component. It supports every sane browser and IE7+.
Layzr.js is a small, fast, modern, and dependency-free library for lazy loading images.
Tada is a lightweight, no dependency library for lazy image load. jQuery plugin is also provided. Duplicate element check, throttled scroll handler, percent threshold supported.
A tiny jQuery plugin for lazy-loading Google Maps.
bLazy is a lightweight lazy loading image script. It lets you lazy load and multi-serve your images so you can save bandwidth and server requests. The user will have faster load times and save data loaded if he/she doesn't browse the whole page.
lazysizes is a fast lazyloader for images (including responsive images), iframes and scripts/widgets without any dependency. It may become also your number one tool to integrate responsive images.