There are 6 repositories under ponyfill topic.
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
Element.scrollIntoView ponyfills for things like "if-needed" and "smooth"
Polyfills the ResizeObserver API.
:clipboard: Simple copying on the web, with maximum browser compatibility. (You probably don't need this anymore!)
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).
Web Streams, based on the WHATWG spec reference implementation
Tiny library (<200B gzip) for deferring something by a "tick"
Spec-compliant FormData implementation for Node.js
🎙MediaRecorder ponyfill that records audio as mp3
Object.fromEntries() ponyfill (in 6 lines)
[DEPRECATED] Node.js `os.homedir()` ponyfill
Universal LocalStorage for browser and Node.js.
A curated list of awesome ponyfills for writing cross-platform and cross-browser code.
Ponyfill and helpers for the standardized Error Causes
A small spec. compliant polyfill for SharedWorkers, it acts as a drop in replacement for normal Workers.
A thin react component wrapper bundled with scroll-into-view-if-needed
[DEPRECATED] Node.js os.tmpdir() ponyfill
(A smaller) polyfill for the react context API
A ponyfill/polyfill for browser Promise unhandledrejection events
🦄 Use React 16's <React.Fragment> in React 15
:snowman: ES6 Symbol polyfill in pure ES5
ES2015 Number.isSafeInteger() ponyfill
ES2015 Number.MAX_SAFE_INTEGER ponyfill
A micro-library for manipulating CSS class names, triggering change events using HTML data attributes, and creating declarative class-related event listeners
A window.resizeTo polyfill for test environments like Jest & JSDOM (in <10 LoC)