polyfill

A cross-browser wrapper for the Web Audio API which aims to closely follow the standard.

Capture form validation back from the browser

A polyfill for native ES6 Promises as close as possible (no extensions) to the strict spec definitions.

CSS Custom Paint / Paint Worklet polyfill with special browser optimizations.

Polyfill for the Encoding Living Standard's API

Polyfill for the proposed React context API

StickyState is a high performant module making native position:sticky statefull and polyfilling the missing sticky browser feature

🚀 A Jekyll plugin to provide powerful supports for table, mathjax, plantuml, mermaid, emoji, video, audio, youtube, vimeo, dailymotion, soundcloud, s...

🍩 1kb minimally viable DOM Document implementation

:shipit: AVIF polyfill for the browser

Symfony polyfill backporting apcu_* functions to lower PHP versions

NodeJS module to create polyfill bundles tailored to individual user-agents.

Fast and lightweight dependency-free vanilla JavaScript polyfill for native lazy loading / the awesome loading='lazy'-attribute.

Display paginated content in the browser and generate print books using web technology

Bootstrap 3 CSS for IE7

Make an image grayscale in all browsers

A browser API to prevent DOM-Based Cross Site Scripting in modern web applications.

A pure JS in-memory implementation of the IndexedDB API

A Javascript polyfill for browsers that don't support the object-fit CSS property.

Backwards compatibility polyfill for React class components

Symfony polyfill backporting some PHP 8.3+ features to lower PHP versions

🔗A lightweight and trustworthy URL polyfill for React Native.

HTML5 `FormData` polyfill for Browsers and nodejs

Use the WebXR Device API today, providing fallbacks to native WebVR 1.1 and Cardboard

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

CSS3 Media Queries Shim

Polyfill URL and URLSearchParams to match last ES7 specifications

some damn DOM fix for this damned browser

Bootstrap 4 for IE8 and IE9

URLPattern polyfill

A polyfill for the sharing that can be used in the desktop, too, so your users can share in their Twitter, Facebook, Messenger, LinkedIn, SMS, e-mail,...

A platform-agnostic drawer layout for react-native

A curated collection of javascript interview questions & solutions.

Variable font inspector

:camera: A poly-fill for the FLIF image format.

React component for anchor links using the smooth scroll polyfill.

browser polyfill for the webp image format

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XMLHttpRequest.js - Standard-compliant cross-browser XMLHttpRequest object implementation

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

Minimal and dependency-free vanilla JavaScript polyfill for the awesome datalist-functionality

Set of polyfills for changed PHPUnit functionality to allow for creating PHPUnit cross-version compatible tests

MediaStream ImageCapture polyfill. Take photos from the browser as easy as .takePhoto().then(processPhoto)

A source code only package which allows you to use .NET's nullable attributes in older target frameworks like .NET Standard 2.0 or the "old" .NET Fram...

Polyfill for Navigator.sendBeacon()

The fastest smallest Javascript polyfill for encodeInto of TextEncoder, encode of TextEncoder, and decode of TextDecoder for UTF-8 only.

Backporting .NET and more: LINQ expressions in .net 2.0 - nuget Theraot.Core available.

A polyfill for the kv-storage built-in module.

Runtime polyfills for TypeScript libs, powered by core-js! :battery: :nut_and_bolt:

A polyfill for the ECMAScript Record and Tuple proposal.