LazySizes

2,050 websites

1,971 uptime cards

What is LazySizes?

LazySizes belongs to JavaScript libraries and Performance categories.

LazySizes is a lightweight, feature-rich JavaScript library used for lazy loading images, iframes, scripts, and other resources. It intelligently loads content only when it's about to enter the viewport, significantly improving page load times and reducing bandwidth usage. LazySizes is highly configurable and works...

LazySizes Performance Insights

2,050 websites

Websites using LazySizes

LazySizes

Last 30 days uptimeⓘ

99.808%

LazySizes friendly technologies

Google Analytics

jQuery

WordPress

Open Graph

Webpack

Bootstrap

Facebook Pixel

Priority Hints

HSTS

Cart Functionality

Cloudflare

Google Font API

Yoast SEO

core-js

Module Federation

PHP

MySQL

Google Tag Manager

Who Uses LazySizes?

1,971 uptime cards

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Instant.Page is a lightweight JavaScript library that uses just-in-time preloading to make website navigation faster.

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InstantClick is a JavaScript library that preloads pages on hover, making website navigation feel instantaneous.

Intersection Observer

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Intersection Observer is a browser API that efficiently detects when an element enters or leaves the viewport, useful for implementing lazy loading and infinite scrolling.