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The Top 517 Polyfill Open Source Projects on Github

Categories > Libraries > Polyfill
Fetch ⭐ 25,106
A window.fetch JavaScript polyfill.
Core Js ⭐ 16,136
Standard Library
History.js ⭐ 10,671
History.js gracefully supports the HTML5 History/State APIs (pushState, replaceState, onPopState) in all browsers. Including continued support for data, titles, replaceState. Supports jQuery, MooTools and Prototype. For HTML5 browsers this means that you can modify the URL directly, without needing to use hashes anymore. For HTML4 browsers it will revert back to using the old onhashchange functionality.
Random_compat ⭐ 7,954
PHP 5.x support for random_bytes() and random_int()
Polyfill Mbstring ⭐ 7,356
This component provides a partial, native PHP implementation for the Mbstring extension.
Es5 Shim ⭐ 7,069
ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines
Polyfill Service ⭐ 5,634
Automatic polyfill service.
Unfetch ⭐ 5,022
🐕 Bare minimum 500b fetch polyfill.
Sugar ⭐ 4,461
A Javascript library for working with native objects.
Polyfill Ctype ⭐ 3,755
This component provides a partial, native PHP implementation for the Ctype extension.
Promise Fun ⭐ 3,494
Promise packages, patterns, chat, and tutorials
Polyfill Php70 ⭐ 3,206
This component provides features unavailable in releases prior to PHP 7.0.
Adapter ⭐ 3,018
Shim to insulate apps from spec changes and prefix differences. Latest adapter.js release:
Eslint Plugin Compat ⭐ 2,762
Check the browser compatibility of your code
Pressure ⭐ 2,756
👇💥 JavaScript library for handling Force Touch, 3D Touch, and Pointer Pressure.
React Native Fetch Blob ⭐ 2,529
A project committed to making file access and data transfer easier, efficient for React Native developers.
Polyfill Intl Icu ⭐ 2,296
This component provides a collection of functions/classes using the symfony/intl package when the Intl extension is not installed.
Stickyfill ⭐ 2,176
Polyfill for CSS `position: sticky`
Jquery Contextmenu ⭐ 2,152
jQuery contextMenu plugin & polyfill
Dialog Polyfill ⭐ 2,149
Polyfill for the HTML dialog element
Rangeslider.js ⭐ 2,139
🎚 HTML5 input range slider element polyfill
Polyfill Php73 ⭐ 2,047
This component provides functions unavailable in releases prior to PHP 7.3.
Object Fit Images ⭐ 2,023
🗻 Polyfill object-fit/object-position on <img>: IE9, IE10, IE11, Edge, Safari, ...
Iphone Inline Video ⭐ 2,019
📱 Make videos playable inline on the iPhone (prevents automatic fullscreen)
Polyfill ⭐ 1,807
PHP polyfills
Fixed Sticky ⭐ 1,487
DEPRECATED: A position: sticky polyfill that works with filamentgroup/fixed-fixed for a safer position:fixed fallback.
Eqcss ⭐ 1,484
EQCSS is a CSS Reprocessor that introduces Element Queries, Scoped CSS, a Parent selector, and responsive JavaScript to all browsers IE8 and up
Resize Observer Polyfill ⭐ 1,464
A polyfill for the Resize Observer API
Polyfill Php56 ⭐ 1,377
This component provides functions unavailable in releases prior to PHP 5.6.
Polyfill Util ⭐ 1,363
This component provides binary-safe string functions, using the mbstring extension when available.
Webvr Polyfill ⭐ 1,351
Use WebVR today, without requiring a special browser build.
Polyfill ⭐ 1,335
JavaScript Polyfills, Shims and More
Css Vars Ponyfill ⭐ 1,253
Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers
Polyfill Php80 ⭐ 1,188
This component provides functions unavailable in releases prior to PHP 8.0.
Broadcast Channel ⭐ 1,170
📡 BroadcastChannel to send data between different browser-tabs or nodejs-processes 📡 + LeaderElection over the channels
Document Register Element ⭐ 1,123
A stand-alone working lightweight version of the W3C Custom Elements specification
Proxy Polyfill ⭐ 1,016
Proxy object polyfill
Polyfill Intl Normalizer ⭐ 1,004
This component provides a fallback implementation for the Normalizer class provided by the Intl extension.
Scroll Into View If Needed ⭐ 978
Element.scrollIntoView ponyfills for things like "if-needed" and "smooth"
Ponyfill ⭐ 959
🦄 Like polyfill but with pony pureness
Polyfill Intl Grapheme ⭐ 948
This component provides a partial, native PHP implementation of the Grapheme functions from the Intl extension.
Fetch Jsonp ⭐ 947
Make JSONP request like window.fetch
Dom4 ⭐ 895
Modern DOM functionalities for every browser
Ie11customproperties ⭐ 851
CSS variables (Custom Properties) polyfill for IE11
Clipboard Polyfill ⭐ 835
📋 Simple copying on the web, with maximum browser compatibility.
Docker Host ⭐ 827
A docker sidecar container to forward all traffic to local docker host or any other host
Url Search Params ⭐ 760
Simple polyfill for URLSearchParams standard
Hyperform ⭐ 736
Capture form validation back from the browser
Jsbi ⭐ 736
JSBI is a pure-JavaScript implementation of the official ECMAScript BigInt proposal.
Sticky State ⭐ 690
StickyState is a high performant module making native position:sticky statefull and polyfilling the missing sticky browser feature
Create React Context ⭐ 689
Polyfill for the proposed React context API
Native Promise Only ⭐ 686
A polyfill for native ES6 Promises as close as possible (no extensions) to the strict spec definitions.
Resize Observer ⭐ 681
Polyfills the ResizeObserver API.
Webassemblyjs ⭐ 637
Toolchain for WebAssembly
Polyfill Apcu ⭐ 630
This component provides apcu_* functions and the APCUIterator class to users of the legacy APC extension.
Css Paint Polyfill ⭐ 608
CSS Custom Paint / Paint Worklet polyfill with special browser optimizations.
Bootstrap Ie7 ⭐ 583
Bootstrap 3 CSS for IE7
Text Encoding ⭐ 582
Polyfill for the Encoding Living Standard's API
Gray ⭐ 567
Make an image grayscale in all browsers
Polyfill Library ⭐ 508
NodeJS module to create polyfill bundles tailored to individual user-agents.
Object Fit Polyfill ⭐ 503
A Javascript polyfill for browsers that don't support the object-fit CSS property.
Undom ⭐ 501
🍩 1kb minimally viable DOM Document implementation
Loading Attribute Polyfill ⭐ 481
Fast and lightweight dependency-free vanilla JavaScript polyfill for native lazy loading / the awesome loading='lazy'-attribute.
Webappsec Trusted Types ⭐ 476
A browser API to prevent DOM-Based Cross Site Scripting in modern web applications.
React Lifecycles Compat ⭐ 462
Backwards compatibility polyfill for React class components
Avif.js ⭐ 422
AVIF polyfill for the browser
Fakeindexeddb ⭐ 397
A pure JS in-memory implementation of the IndexedDB API
Standardized Audio Context ⭐ 393
A cross-browser wrapper for the Web Audio API which aims to closely follow the standard.
Css3 Mediaqueries Js ⭐ 336
CSS3 Media Queries Shim
Jekyll Spaceship ⭐ 322
🚀 A Jekyll plugin to provide powerful supports for table, mathjax, plantuml, mermaid, emoji, video, audio, youtube, vimeo, dailymotion, soundcloud, spotify, etc.
Formdata ⭐ 318
HTML5 `FormData` polyfill for Browsers.
Pagedjs ⭐ 303
Display paginated content in the browser and generate print books using web technology
Ie8 ⭐ 295
some damn DOM fix for this damned browser
Webxr Polyfill ⭐ 283
Use the WebXR Device API today, providing fallbacks to native WebVR 1.1 and Cardboard
Abortcontroller Polyfill ⭐ 283
Polyfill for the AbortController DOM API and abortable fetch (stub that calls catch, doesn't actually abort request).
Bootstrap Ie8 ⭐ 280
Bootstrap 4 for IE8 and IE9
Url Polyfill ⭐ 277
Polyfill URL and URLSearchParams to match last ES7 specifications
React Native Drawer Layout ⭐ 258
A platform-agnostic drawer layout for react-native
Poly Flif ⭐ 232
📷 A poly-fill for the FLIF image format.
Details Element Polyfill ⭐ 231
<details>
Share Api Polyfill ⭐ 231
A polyfill for the sharing that can be used in desktop too, so your users can shere in their twitter, facebook, messenger, linkedin, sms, e-mail, print, telegram or whatsapp.
Polyfill Php81 ⭐ 225
This component provides functions unavailable in releases prior to PHP 8.1.
Babel Polyfills ⭐ 225
A set of Babel plugins that enable injecting different polyfills with different strategies in your compiled code.
Tickedoff ⭐ 214
Tiny library (<200B gzip) for deferring something by a "tick"
Xmlhttprequest ⭐ 205
XMLHttpRequest.js - Standard-compliant cross-browser XMLHttpRequest object implementation
Datalist Polyfill ⭐ 201
Minimal and dependency-free vanilla JavaScript polyfill for the awesome datalist-functionality
Samsa ⭐ 182
Variable font inspector
Webp Hero ⭐ 159
browser polyfill for the webp image format
React Native Url Polyfill ⭐ 157
🔗A lightweight and trustworthy URL polyfill for React Native.
Web Streams Polyfill ⭐ 156
Web Streams, based on the WHATWG spec reference implementation
React Anchor Link Smooth Scroll ⭐ 149
React component for anchor links using the smooth scroll polyfill.
React Af ⭐ 145
Allows you to code using certain React.next features today! Perfect for component library maintainers.
Kv Storage Polyfill ⭐ 138
A polyfill for the kv-storage built-in module.
Mdn Polyfills ⭐ 135
MDN polyfills - from, forEach, filter, find, findIndex, assign, includes, create, entries, of, repeat, startsWith, endsWith, toggleAttribute, bind, MouseEvent, CustomEvent, padEnd, padStart
Navigator.sendbeacon ⭐ 134
Polyfill for Navigator.sendBeacon()
Imagecapture Polyfill ⭐ 123
MediaStream ImageCapture polyfill. Take photos from the browser as easy as .takePhoto().then(processPhoto)
Theraot ⭐ 121
Backporting .NET and more: LINQ expressions in .net 2.0 - nuget Theraot.Core available.
Touch Action ⭐ 120
Disable 300ms delay on mobile using CSS touch-action or asynchronously download FastClick as polyfill
Webcrypto Liner ⭐ 118
webcrypto-liner is a polyfill that let's down-level User Agents (like IE/Edge) use libraries that depend on WebCrypto. (Keywords: Javascript, WebCrypto, Shim, Polyfill)
Match Media ⭐ 114
Universal polyfill for match media API using Expo APIs on mobile
1-100 of 517 projects

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Php Polyfill Projects (47)
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Polyfill Ponyfill Projects (42)
Javascript Polyfill Ponyfill Projects (36)
Html Polyfill Projects (35)
Css Polyfill Projects (33)
Node Polyfill Projects (28)
Advertising 📦 9
All Projects
Application Programming Interfaces 📦 120
Applications 📦 181
Artificial Intelligence 📦 72
Blockchain 📦 70
Build Tools 📦 111
Cloud Computing 📦 79
Code Quality 📦 28
Collaboration 📦 30
Command Line Interface 📦 48
Community 📦 81
Companies 📦 60
Compilers 📦 60
Computer Science 📦 74
Configuration Management 📦 39
Content Management 📦 167
Control Flow 📦 197
Data Formats 📦 77
Data Processing 📦 266
Data Storage 📦 132
Economics 📦 60
Frameworks 📦 198
Games 📦 122
Graphics 📦 103
Hardware 📦 148
Integrated Development Environments 📦 47
Learning Resources 📦 147
Legal 📦 28
Libraries 📦 119
Lists Of Projects 📦 21
Machine Learning 📦 336
Mapping 📦 61
Marketing 📦 15
Mathematics 📦 55
Media 📦 228
Messaging 📦 97
Networking 📦 304
Operating Systems 📦 84
Operations 📦 120
Package Managers 📦 52
Programming Languages 📦 229
Runtime Environments 📦 96
Science 📦 42
Security 📦 375
Social Media 📦 26
Software Architecture 📦 70
Software Development 📦 68
Software Performance 📦 57
Software Quality 📦 127
Text Editors 📦 45
Text Processing 📦 131
User Interface 📦 310
User Interface Components 📦 465
Version Control 📦 29
Virtualization 📦 68
Web Browsers 📦 38
Web Servers 📦 25
Web User Interface 📦 194
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