polyfill

A window.fetch JavaScript polyfill.

Standard Library

History.js gracefully supports the HTML5 History/State APIs (pushState, replaceState, onPopState) in all browsers. Including continued support for dat...

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

Symfony polyfill for the Mbstring extension

Automatic polyfill service.

ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines

🐕 Bare minimum 500b fetch polyfill.

Promise packages, patterns, chat, and tutorials

Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions

A Javascript library for working with native objects.

Symfony polyfill for ctype functions

Shim to insulate apps from spec changes and prefix differences. Latest adapter.js release:

Symfony polyfill for intl's idn_to_ascii and idn_to_utf8 functions

This component provides features unavailable in releases prior to PHP 7.0.

Check the browser compatibility of your code

:point_down::boom: JavaScript library for handling Force Touch, 3D Touch, and Pointer Pressure.

PHP polyfills

A project committed to making file access and data transfer easier, efficient for React Native developers.

Symfony polyfill for intl's ICU-related data and classes

Polyfill for the HTML dialog element

Symfony polyfill backporting some PHP 7.3+ features to lower PHP versions

Polyfill for CSS `position: sticky`

jQuery contextMenu plugin & polyfill

🎚 HTML5 input range slider element jQuery polyfill

Symfony polyfill for intl's Normalizer class and related functions

📱 Make videos playable inline on the iPhone (prevents automatic fullscreen)

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

:satellite: BroadcastChannel to send data between different browser-tabs or nodejs-processes :satellite: + LeaderElection over the channels https://p...

Symfony polyfill for the Iconv extension

A polyfill for the Resize Observer API

Symfony polyfill for intl's grapheme_* functions

Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions

This component provides functions unavailable in releases prior to PHP 5.6.

EQCSS is a CSS Reprocessor that introduces Element Queries, Scoped CSS, a Parent selector, and responsive JavaScript to all browsers IE8 and up

DEPRECATED: A position: sticky polyfill that works with filamentgroup/fixed-fixed for a safer position:fixed fallback.

Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers

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

Use WebVR today, without requiring a special browser build.

Symfony utilities for portability of PHP codes

Display paginated content in the browser and generate print books using web technology

🦄 Like polyfill but with pony pureness

A docker sidecar container to forward all traffic to local docker host or any other host

Proxy object polyfill

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

Make JSONP request like window.fetch

Polyfills the ResizeObserver API.

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

Modern DOM functionalities for every browser

:clipboard: Simple copying on the web, with maximum browser compatibility. (You probably don't need this anymore!)