<h1 align="center" style="border-bottom: none;">🔎 PerformanceObserver Polyfill</h1> <p align="center"> <a href="https://travis-ci.org/fastly/performance-observer-polyfill"> <img alt="Travis" src="https://img.shields.io/travis/fastly/performance-obs

Generic implementation of the observer pattern

A polyfill for the Resize Observer API

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

Font face observer for eventing when web fonts are loaded

Vue普通元素resize事件监听

Primitive providing the ability to watch for changes made to the DOM tree.

Deep state observer is an state management library that will fire listeners only when specified object node (which also can be a wildcard) was changed.

An easy to use React hook wrapper around the ResizeObserver API.

A ResizeObserver polyfill that has limited functionality of ResizeObserver.

React components to add reveal animations using the Intersection Observer API and CSS Animations.

VueJS directive to observe changes in DOM use MutationObserver API

[](https://brm.us/style-observer)

Observe easily the FPS (framerates) of your animations loops.

A react hook to use the IntersectionObserver declaratively in your React app.

Real-time observability dashboard for babysitter orchestration runs

[![version][npm-img]][npm-url] [![license][mit-img]][mit-url] [![size][size-img]][size-url] [![download][download-img]][download-url]

Register a components init function & observe selector. The init function will be fired immedietly after detection of selector.

Performant react hooks for WebApi Observers, useResizeObserver, useInteractionObserver, useMutationObserver

React hook to detect if web fonts are available 🪝