polyfill

rewrite constructor arguments, call DOMPurify, profit

Automatically annotate CSS Grid items with row and column positions, so they are correctly positioned in IE11.

Polyfill for the selectlist element

ES2017 spec-compliant shim for Object.entries

Canvas JavaScript polyfill for the vital and pivotal S we all drew in school.

CSS Toggles demo and polyfill

Polyfill for ECMAScript 6's `Function.name`.

Browser polyfill for making React Native compatible with web libs like pixi.js, three.js, phaser.js

WASM-based implementation of Cloudflare's HTML Rewriter for use in Deno, browsers, etc.

ES6 Proxy polyfill, supports IE8+, Node.js, etc.

Add polyfills to rogchap/v8go

strictly unofficial polyfill for Web Audio API AudioWorklet

A polyfill for React Natives DrawerLayoutAndroid

Polyfills `CanvasRenderingContext2d.filter` capability of adopting CSS3 filters to canvas contexts at least partially.

Transforming HTML standards of the future into JavaScript standards of the past

JavaScript polyfill for the WHATWG spec of focusOptions, that enables a set of options to be passed to the focus method

A WebAssembly polyfill for the Barcode Detection API

like core-js but for Web APIs

Object.keys shim

Array.prototype.includes spec-compliant polyfill

The polyfill for IE8-11 and other HTML4 browsers, a minimal set with most essential polyfills.

Make `require` work in browsers, at runtime. No code bundling needed!

⚓ Apply smooth scroll to anchor links, polyfill scroll-behavior

Spec compliant polyfill of the Barcode Detection API 🤳

Implements the `{{on eventName this.someAction}}` element modifier from https://github.com/emberjs/rfcs/blob/master/text/0471-on-modifier.md

Web Streams Standard implementation and polyfill

A DOM-based implementation of Cloudflare Worker's HTMLRewriter.

.NET polyfill to the future. A versatile RAD framework for .NET platform.

Small vanilla javascript that feature detect the :focus-within pseudo selector and polyfills it with a standard css class if necessary.

Workaround for browser bugs in Range.prototype.getClientRects and Range.prototype.getBoundingClientRect.

An ESnext spec-compliant `DisposableStack`, `AsyncDisposableStack`, `Symbol.dispose`, and `Symbol.asyncDispose` shim/polyfill/replacement that works a...

Everything is module~

An ESnext spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

A Fetch API "Headers" polyfill and transformation library.

An ESnext spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

Frontend problems with solution that would help to improve concepts related to web fundamentals

ECMAScript 5 Polyfill for IE-8

Symfony polyfill backporting some PHP 7.4+ features to lower PHP versions

ECMAScript6 WeakMap polyfill

PostCSS plugin to generate a custom CSS var shim

An up-to-date Device Parameter Database for the WebVR Polyfill

A ponyfill/polyfill for browser Promise unhandledrejection events

Polyfills and patches missing or partially supported web and core APIs.

Drop-in replacement for the fs NodeJS package

An ESnext spec-compliant `Array.prototype.group` shim/polyfill/replacement that works as far down as ES3.

This component provides functions unavailable in releases prior to PHP 7.1.

An ES-spec-compliant (proposed) `Array.prototype.at`shim/polyfill/replacement that works as far down as ES3.

Shim/polyfill for IDBObjectStore.getAll, IDBIndex.getAll, IDBObjectStore.getAllKeys, and IDBIndex.getAllKeys

Less & CSS extension framework UiKit

Polyfill for Node.js module.createRequire (<= v12.2.0)