Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

Simple lazy loading component built with react

Intersection Observer Component

MutationObserver shim for ES3 environments

react-native-perf-stats

Simple transparent reactivity with 100% language coverage. Made with ES6 Proxies.

React lazy loading component, images, etc. It will monitor element and tell you when element enters into the viewport.

Library of reusable core interfaces, types and constants migrated from fps-library-v2

Glue layer for reactivity

Detect when an element is becoming visible or hidden on the page.

Allows you to monitor DOM elements that match a CSS selector

FPS as an EventEmitter, designed for the browser

An abstraction for Mutation Observer with some extra features

Plugin-owned human command registry for DeepSeek Harness UI surfaces

easy to use progress-bar for command-line/terminal applications

Lightweight visual FPS monitor with auto-refresh-rate detection, compact mode, theming, and zero dependencies.

Astronomy calculation for Sun, Moon, and planets.

A React hook that fires a callback whenever ResizeObserver detects a change to its size

A dependency-free collection of screen utility functions in Vue 3.

macOS Apple Silicon (arm64) binary for @superbased/observer.