Top 169 polyfill open source projects

Spec-compliant polyfill for String.prototype.matchAll, in ES2020

Scoped CSS polyfill

(A smaller) polyfill for the react context API

strictly unofficial polyfill for Web Audio API AudioWorklet

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

Making it easy to write async iterators in Python 3.5

🖥 A screen.orientation ponyfill

A polyfill for the AppHistory proposal

Type and Reflection polyfill extension methods. .NET 3.5+ and .NET Standard 1.0+.

Ensure that all GitHub and GitLab scripts required for UXP and SeaMonkey are loaded correctly

Object.keys shim

A polyfill to use WebAssembly in React Native.

Insert polyfills (such as Promise) for Webpack 2

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

A curated collection of javascript interview questions & solutions.

An artifact repository to assist writing Gradle Plugins for Android build system.

Collection of polyfill (backport) and incubator features for Symfony 3

ECMAScript6 WeakMap polyfill

This component provides functions unavailable in releases prior to PHP 8.1.

A tiny WebWorker polyfill for the file:// protocol

A fetch API polyfill for React Native with text streaming support.

provides the Promise and fetch goodies needed for IE(11) support w/ parcel bundle loading

ES Proposal spec-compliant shim for Promise.allSettled

Spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.

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

A polyfill for React Natives DrawerLayoutAndroid

A JavaScript implementation of a WebVR 1.1 VRDisplay

Dispatches global fetch events using Deno's native http server.

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

ES5 spec-compliant shim for String.prototype.trim

rewrite constructor arguments, call DOMPurify, profit

Scroll Behavior polyfill

Array.prototype.includes spec-compliant polyfill

Audio polyfill for desktop and native.

The bare essentials of std::io for use in no_std. Alloc support is optional.

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

console.time and console.timeEnd polyfill for react-native

🌈a beautify polyfill for native drag!

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

A source code only package which allows you to use C# 9's init and record features in older target frameworks like .NET Standard 2.0 or the "old" .NET Framework by providing a polyfill for the IsExternalInit class.

This component provides functions unavailable in releases prior to PHP 7.4.

Smart a lightweight web component library that provides capabilities for web components, such as data binding, using es6 native class inheritance. This library is focused for providing the developer the ability to write robust and native web components without the need of dependencies and an overhead of a framework.

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

A polyfill for scoped HTML styles elements

Spec compliant polyfill of the Barcode Detection API 🤳

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

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

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

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