ponyfill

Standard Library

🐕 Bare minimum 500b fetch polyfill.

Promise packages, patterns, chat, and tutorials

A polyfill for the Resize Observer API

Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers

🦄 Like polyfill but with pony pureness

Element.scrollIntoView ponyfills for things like "if-needed" and "smooth"

📋 Simple copying on the web, with maximum browser compatibility. (You probably don't need this anymore!)

Polyfills the ResizeObserver API.

A pure JS in-memory implementation of the IndexedDB API

Polyfill for the AbortController DOM API and abortable fetch (stub that calls catch, doesn't actually abort request).

WHATWG fetch ponyfill

Tiny library (<200B gzip) for deferring something by a "tick"

Web Streams, based on the WHATWG spec reference implementation

Spec-compliant FormData implementation for Node.js

Object.fromEntries() ponyfill (in 6 lines)

🎙MediaRecorder ponyfill that records audio as mp3

[DEPRECATED] Node.js `os.homedir()` ponyfill

🖥 A screen.orientation ponyfill

Universal LocalStorage for browser and Node.js.

A curated list of awesome ponyfills for writing cross-platform and cross-browser code.

(A smaller) polyfill for the react context API

[DEPRECATED] Node.js os.tmpdir() ponyfill

FormData.entries ponyfill

Ponyfill and helpers for Error Causes

A thin react component wrapper bundled with scroll-into-view-if-needed

A ponyfill/polyfill for browser Promise unhandledrejection events

🦄 Use React 16's <React.Fragment> in React 15

ES2015 Number.isSafeInteger() ponyfill

⛄ ES6 Symbol polyfill in pure ES5