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.

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

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

🦄 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!)