Isomorphic TextEncoder / TextDecoder ponyfill for browser and Node.js
A ponyfill (doesn't overwrite the native methods) to use Edge Runtime APIs in any environment.
Cross Platform Smart Fetch Ponyfill
Ponyfill and helpers for Error Causes
A TextDecoder replacement
Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers
Ponyfill for upcoming Element.scrollIntoView() APIs like scrollMode: if-needed, behavior: smooth and block: center
Web Streams, based on the WHATWG spec reference implementation
DOM manipulation utilities for Material Components for the web
A ponyfill (doesn't overwrite the native fetch) for the Fetch specification https://fetch.spec.whatwg.org.
Fast polyfill for TextEncoder and TextDecoder, only supports utf-8
TextEncoder and TextDecoder APIs from Encoding Standard APIs in a universal package
Various operations on Uint8Array data
Fetch polyfilled in Node only
Universal WHATWG Fetch API for Node, Browsers and React Native
Bare minimum fetch polyfill in 500 bytes
Error.captureStackTrace ponyfill
Declarative Shadow DOM for SSR
Intl.PluralRules polyfill
Object.fromEntries() ponyfill (in 6 lines)
Simple implementation of Object.assign
Text Decoder
A superset of the JSDOM environment for Jest that respects Node.js globals.
base64 utilities for TypeScript and JavaScript