polyfill

CSS variables (Custom Properties) polyfill for IE11

Symfony polyfill backporting some PHP 8.1+ features to lower PHP versions

Toolchain for WebAssembly

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

Simple polyfill for URLSearchParams standard

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

Polyfill for the Encoding Living Standard's API

Capture form validation back from the browser

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

:shipit: AVIF polyfill for the browser

🍩 1kb minimally viable DOM Document implementation

Polyfill for the proposed React context API

Symfony polyfill for uuid functions

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...

A pure JS in-memory implementation of the IndexedDB API

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

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.

Bootstrap 3 CSS for IE7

Make an image grayscale in all browsers

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

Polyfill for CSS Anchor Positioning

Backwards compatibility polyfill for React class components

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

A Vite plugin to polyfill Node's Core Modules for browser environments.

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

🔗A lightweight and trustworthy URL polyfill for React Native.

Polyfills the HTML popover attribute and showPopover/hidePopover/togglePopover methods onto HTMLElement, as well as the popovertarget and popovertarge...

HTML5 `FormData` polyfill for Browsers and nodejs

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

CSS3 Media Queries Shim

Polyfill URL and URLSearchParams to match last ES7 specifications

URLPattern polyfill

some damn DOM fix for this damned browser

Bootstrap 4 for IE8 and IE9

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,...

Variable font inspector

A curated collection of javascript interview questions & solutions.

A platform-agnostic drawer layout for react-native

browser polyfill for the webp image format

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

React component for anchor links using the smooth scroll polyfill.

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

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

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

A Barcode Detection API ponyfill/polyfill that uses ZXing-C++ WebAssembly under the hood.