Most popular polyfill repositories and open source projects

fetch

A window.fetch JavaScript polyfill.

3207   25774   25774  

core-js

Standard Library

1643   22581   22581  

history.js

History.js gracefully supports the HTML5 History/State APIs (pushState...

1401   10776   10776  

random_compat

PHP 5.x support for random_bytes() and random_int()

128   8104   8104  

polyfill-mbstring

This component provides a partial, native PHP implementation for the M...

39   7681   7681  

es5-shim

ECMAScript 5 compatibility shims for legacy (and modern) JavaScript en...

939   7117   7117  

polyfill-service

Automatic polyfill service.

547   6049   6049  

unfetch

🐕 Bare minimum 500b fetch polyfill.

227   5602   5602  

Sugar

A Javascript library for working with native objects.

326   4511   4511  

promise-fun

Promise packages, patterns, chat, and tutorials

121   4311   4311  

polyfill-ctype

This component provides a partial, native PHP implementation for the C...

6   3965   3965  

adapter

Shim to insulate apps from spec changes and prefix differences. Latest...

862   3450   3450  

polyfill-php70

This component provides features unavailable in releases prior to PHP...

9   3248   3248  

eslint-plugin-compat

Check the browser compatibility of your code

122   2960   2960  

pressure

:point_down::boom: JavaScript library for handling Force Touch, 3D To...

107   2871   2871  

react-native-fetch-blob

A project committed to making file access and data transfer easier, ef...

1517   2605   2605  

polyfill-intl-icu

This component provides a collection of functions/classes using the sy...

4   2504   2504  

dialog-polyfill

Polyfill for the HTML dialog element

271   2399   2399  

polyfill

PHP polyfills

127   2383   2383  

polyfill-php73

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

9   2367   2367  

stickyfill

Polyfill for CSS `position: sticky`

259   2280   2280  

jQuery-contextMenu

jQuery contextMenu plugin & polyfill

754   2221   2221  

rangeslider.js

🎚 HTML5 input range slider element polyfill

406   2161   2161  

iphone-inline-video

📱 Make videos playable inline on the iPhone (prevents automatic fullsc...

314   2049   2049  

object-fit-images

🗻 Polyfill object-fit/object-position on <img>: IE9, IE10, IE11, Edge,...

285   2049   2049  

polyfill-intl-normalizer

This component provides a fallback implementation for the Normalizer c...

4   1765   1765  

resize-observer-polyfill

A polyfill for the Resize Observer API

139   1688   1688  

polyfill-php80

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

18   1575   1575  

polyfill-php56

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

4   1551   1551  

broadcast-channel

:satellite: BroadcastChannel to send data between different browser-ta...

119   1546   1546  

eqcss

EQCSS is a CSS Reprocessor that introduces Element Queries, Scoped CSS...

73   1502   1502  

fixed-sticky

DEPRECATED: A position: sticky polyfill that works with filamentgroup/...

162   1488   1488  

css-vars-ponyfill

Client-side support for CSS custom properties (aka "CSS variables") in...

64   1439   1439  

polyfill-intl-grapheme

This component provides a partial, native PHP implementation of the Gr...

4   1439   1439  

webvr-polyfill

Use WebVR today, without requiring a special browser build.

338   1396   1396  

polyfill-util

This component provides binary-safe string functions, using the mbstri...

6   1341   1341  

scroll-into-view-if-needed

Element.scrollIntoView ponyfills for things like "if-needed" and "smoo...

78   1210   1210  

ponyfill

🦄 Like polyfill but with pony pureness

24   1145   1145  

document-register-element

A stand-alone working lightweight version of the W3C Custom Elements s...

119   1135   1135  

proxy-polyfill

Proxy object polyfill

185   1108   1108  

docker-host

A docker sidecar container to forward all traffic to local docker host...

90   1023   1023  

fetch-jsonp

Make JSONP request like window.fetch

160   981   981  

dom4

Modern DOM functionalities for every browser

51   927   927  

ie11CustomProperties

CSS variables (Custom Properties) polyfill for IE11

86   914   914  

clipboard-polyfill

:clipboard: Simple copying on the web, with maximum browser compatibil...

100   890   890  

resize-observer

Polyfills the ResizeObserver API.

43   886   886  

jsbi

JSBI is a pure-JavaScript implementation of the official ECMAScript Bi...

68   850   850  

url-search-params

Simple polyfill for URLSearchParams standard

103   766   766  

polyfill-php81

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

9   763   763  

hyperform

Capture form validation back from the browser

36   751   751