1013 Open source projects that are alternatives of or similar to Yall.js

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A lightweight, fast, feature-rich, powerful and highly configurable delayed content, image and background lazy loading plugin for jQuery & Zepto.

LazyLoad is a lightweight, flexible script that speeds up your website by deferring the loading of your below-the-fold images, backgrounds, videos, iframes and scripts to when they will enter the viewport. Written in plain "vanilla" JavaScript, it leverages IntersectionObserver, supports responsive images and enables native lazy loading.

😴 gandul! accessible lazy loading images

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High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.

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Universal lazy loader components using IntersectionObserver for React

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React implementation of the Intersection Observer API to tell you when an element enters or leaves the viewport.

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Image lazy load library for Angular 2+

前端性能指标的监控,采集以及上报。用于测量第一个dom生成的时间(FP/FCP/LCP)、用户最早可操作时间（fid|tti）和组件的生命周期性能,，网络状况以及资源大小等等。向监控后台报告实际用户测量值。

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Progressive & lazy loading images.

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Standalone LazyLoad plugin for WordPress (based on WP Rocket)

Eleventy plugin that adds blurry placeholders & lazy loading to your images

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🦌 Tiny, performant, SEO-friendly lazy loading library

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Minimal effort 350 byte JavaScript library to lazy load all <img> on your website

🧙🏽‍♀️ Automatically adds loading="lazy" to <img> and <iframe> tags. Load images on your sites lazily without JavaScript.

Performance-Bookmarklet helps to analyze the current page through the Resource Timing API, Navigation Timing API and User-Timing - requests by type, domain, load times, marks and more. Sort of a light live WebPageTest.

React Component to lazy load images and components using a HOC to track window scroll position.

😎 🖥️ React hook to monitor an element enters or leaves the viewport (or another element).

Discoveries on Sustainable Loading research

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Lazysizes module for Nuxt.js

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An accurate and simple tool uses KVO to measure the time cost of every view controller.

Ansible Role - Memcached

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QuickLook and Spotlight plugins to display the dimensions, size and DPI of an image in the title bar instead of the filename. Also preview some unsupported formats like WebP & bpg.

Python import profiler

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AWS Lambda Power Tuner UI is an open source project creating a deployable easy to use website built on a layered technology stack allowing you to optimize your Lambda functions for cost and/or performance in a data-driven way via an easy to use UI.

This repository holds the NativeScript plugin that exposes the functionality of the Fresco image library to NativeScript developers.

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This package is a complete tool for creating a large dataset of images (specially designed -but not only- for machine learning enthusiasts). It can crawl the web, download images, rename / resize / covert the images and merge folders..

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Performance tweaks for the front-end and back-end of a store.