Most popular polyfill repositories and open source projects

fetch

A window.fetch JavaScript polyfill.

3207   25774   25774  

core-js

Standard Library

1668   24931   24931  

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  

promise-fun

Promise packages, patterns, chat, and tutorials

133   4859   4859  

Sugar

A Javascript library for working with native objects.

326   4511   4511  

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 fulls...

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  

docker-host

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

89   1129   1129  

proxy-polyfill

Proxy object polyfill

185   1108   1108  

fetch-jsonp

Make JSONP request like window.fetch

160   981   981  

dom4

Modern DOM functionalities for every browser

51   927   927  

clipboard-polyfill

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

98   919   919  

ie11CustomProperties

CSS variables (Custom Properties) polyfill for IE11

86   914   914  

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   746   746