Most popular polyfill repositories and open source projects

iframe-worker

A tiny WebWorker polyfill for the file:// protocol

9   23   23  

appHistory

A polyfill for the AppHistory proposal

2   23   23  

NetStandardPolyfills

Type and Reflection polyfill extension methods. .NET 3.5+ and .NET Sta...

1   22   22  

headers-polyfill

A Fetch API "Headers" polyfill and transformation library.

6   22   22  

preload-polyfill

polyfills link[rel="preload"] for legacy browsers

0   20   20  

react-dot-fragment

🦄 Use React 16's <React.Fragment> in React 15

2   20   20  

ember-cached-decorator-polyfill

Polyfill for RFC 566: @cached

7   20   20  

deno-fetch-event-adapter

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

2   20   20  

Object.getOwnPropertyDescriptors

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

8   20   20  

webpack2-polyfill-plugin

Insert polyfills (such as Promise) for Webpack 2

1   19   19  

symfony-tools

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

2   19   19  

selectmenu-polyfill

Polyfill for the selectmenu element

0   19   19  

history.state

Polyfill `history.state` on iOS 5- and Android 4.3-.

3   18   18  

is_countable-polyfill

A trivial but working polyfill for PHP 7.3 is_countable function. Supp...

3   18   18  

assign-symbols

Assign the enumerable es6 Symbol properties from an object (or objects...

8   18   18  

smart-custom-element

Smart a lightweight web component library that provides capabilities f...

4   18   18  

backdropper

Polyfill for CSS backdrop-filter

0   18   18  

gatsby-plugin-smoothscroll

Polyfilled smoothscroll behavior and helper function for gatsby sites

3   17   17  

symbol-es6

:snowman: ES6 Symbol polyfill in pure ES5

9   17   17  

String.prototype.matchAll

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

4   17   17  

error-cause

An ES-spec-compliant shim/polyfill/replacement for the `.cause` proper...

3   17   17  

scrolling-element

A polyfill for document.scrollingElement

4   16   16  

parcel-plugin-goodie-bag

provides the Promise and fetch goodies needed for IE(11) support w/ pa...

4   16   16  

event-propagation-path

Polyfill for the JavaScript Event path/composedPath property

4   16   16  

pointer-events

A Level 2 spec-compliant Pointer Events polyfill with first-class Shad...

1   16   16  

url

Makes the algorithms and APIs defined by URL Standard (replaces RFC 39...

2   15   15  

promyfill

🔥 450Bytes Promise based conditional polyfill loader

0   15   15  

AggregateError

ES Proposal spec-compliant shim for AggregateError

2   15   15  

eme-encryption-scheme-polyfill

A polyfill to add support for EncryptionScheme queries in EME and Medi...

11   15   15  

polyfill-io-feature-detection

Feature detection in the browser before loading polyfill using service...

2   14   14  

class-change

A micro-library for manipulating CSS class names, triggering change ev...

5   14   14  

Array.prototype.find

Polyfill for the The find() method. Returns a value in the array, if a...

4   14   14  

Madness

Madness embraces your project by including compatibility layer for sel...

2   14   14  

custom-builtin-elements

A full-featured polyfill for customized built-in elements

1   13   13  

String.prototype.trim

ES5 spec-compliant shim for String.prototype.trim

5   13   13  

sw-periodic-sync

Just a "polyfill" solution for the serviceWorker periodicSync, it does...

0   13   13  

polyfill-xml

This polyfill is deprecated. Use the symfony/polyfill-php72 package in...

2   13   13  

react-native-audio-polyfill

Audio polyfill for desktop and native.

5   13   13  

dwnld-attr-polyfill

Polyfills the a[download] attribute

4   13   13  

wp-admin-tabbed-settings-pages

A polyfill for Trac #51086, bringing tabbed settings pages into WP-Adm...

4   13   13  

exposure-lib

Based on the InterfaceObserver API, a callback is performed when a bou...

0   13   13  

legacy-gatsby-plugin-polyfill-io

5   12   12  

intl-relative-time-format

A fully spec-compliant polyfill for 'Intl.RelativeTimeFormat'

1   12   12  

tiny-swiper

一个轻量，兼容ie7、ie8，3D swiper插件。

5   12   12  

SPromiseMeSpeedJS

The JavaScript library that promises you the fastest ES6 promises

2   12   12  

intrinsicsize-polyfill

Intrinsicsize-attribute polyfill

0   11   11  

ie-array-find-polyfill

Polyfill to provide array.find on IE.

1   11   11  

Fix-IE

Ironically-named bundle of polyfills for Internet Explorer 8-9.

3   11   11  

is-nan

ES6-compliant shim for Number.isNaN - the global isNaN returns false p...

5   11   11  

php-ereg-shim

Replacement for the ereg legacy php extension

1   11   11