Found 3164 results for polyfill

string.prototype.trimend

ES2019 spec-compliant String.prototype.trimEnd shim.

array-buffer-byte-length

Get the byte length of an ArrayBuffer, even in engines without a `.byteLength` method.

core-util-is

The `util.is*` functions introduced in Node v0.12.

has-symbols

Determine if the JS environment has Symbol support. Supports spec, or shams.

regexp.prototype.flags

ES6 spec-compliant RegExp.prototype.flags shim.

fs.realpath

Use node's fs.realpath, but fall back to the JS implementation if the native one fails

setprototypeof

A small polyfill for Object.setprototypeof

array.prototype.findlastindex

An ESnext spec-compliant `Array.prototype.findLastIndex` shim/polyfill/replacement that works as far down as ES3.

arraybuffer.prototype.slice

ES spec-compliant shim for ArrayBuffer.prototype.slice

array.prototype.flat

An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

object.assign

ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim

string.prototype.trim

ES5 spec-compliant shim for String.prototype.trim

string.prototype.trimstart

ES2019 spec-compliant String.prototype.trimStart shim.

object-is

ES2015-compliant shim for Object.is - differentiates between -0 and +0

globalthis

ECMAScript spec-compliant polyfill/shim for `globalThis`

function.prototype.name

An ES2015 spec-compliant `Function.prototype.name` shim

string.prototype.repeat

A robust & optimized `String.prototype.repeat` polyfill, based on the ECMAScript 6 specification.

object.values

ES2017 spec-compliant Object.values shim.

array-includes

An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.

reflect.getprototypeof

An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible

object.fromentries

ES proposal-spec-compliant Object.fromEntries shim.

array.prototype.flatmap

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

web-streams-polyfill

Web Streams, based on the WHATWG spec reference implementation

object.entries

ES2017 spec-compliant Object.entries shim.

string.prototype.includes

A robust & optimized `String.prototype.includes` polyfill, based on the ECMAScript 6 specification.

array.prototype.findlast

An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.

array.prototype.tosorted

An ESnext spec-compliant `Array.prototype.toSorted` shim/polyfill/replacement that works as far down as ES3.

css.escape

A robust polyfill for the `CSS.escape` utility method as defined in CSSOM.

object.groupby

An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.

es-iterator-helpers

An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.

@tybys/wasm-util

WASI polyfill for browser and some wasm util

raf

requestAnimationFrame polyfill for node and the browser

Assign the enumerable es6 Symbol properties from one or more objects to the first object passed on the arguments. Can be used as a supplement to other extend, assign or merge methods as a polyfill for the Symbols part of the es6 Object.assign method.

core-js-pure

Standard library

es6-promise

A lightweight library that provides tools for organizing asynchronous code

es5-ext

ECMAScript extensions and shims

array.prototype.reduce

An ES5 spec-compliant `Array.prototype.reduce` shim/polyfill/replacement that works as far down as ES3.

object.getownpropertydescriptors

ES2017 spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.

postcss-focus-within

Use the :focus-within pseudo-selector in CSS

css-blank-pseudo

Style form elements when they are empty

map-or-similar

A JavaScript (JS) Map or Similar object polyfill if Map is not available.

formdata-polyfill

HTML5 `FormData` for Browsers and Node.

es6-symbol

ECMAScript 6 Symbol polyfill

node-abort-controller

AbortController for Node based on EventEmitter

homedir-polyfill

Node.js os.homedir polyfill for older versions of node.js.

util.promisify

Polyfill/shim for util.promisify in node versions < v8

is-nan

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.

resize-observer-polyfill

A polyfill for the Resize Observer API

ext

JavaScript utilities with respect to emerging standard

object.hasown

ES spec-compliant shim for Object.hasOwn

path-dirname

Node.js path.dirname() ponyfill

fromentries

Object.fromEntries() ponyfill (in 6 lines)

is-absolute

Returns true if a file path is absolute. Does not rely on the path module and can be used as a polyfill for node.js native `path.isAbolute`.

css-has-pseudo

Style elements relative to other elements in CSS

array-find-index

ES2015 `Array#findIndex()` ponyfill

@csstools/postcss-is-pseudo-class

A pseudo-class for matching elements in a selector list

@sec-ant/readable-stream

A tiny, zero-dependency yet spec-compliant asynchronous iterator polyfill/ponyfill for ReadableStreams.

crypto-randomuuid

Polyfill crypto.randomUUID

postcss-dir-pseudo-class

Use the :dir pseudo-class in CSS

unfetch

Bare minimum fetch polyfill in 500 bytes

@juggle/resize-observer

Polyfills the ResizeObserver API and supports box size options from the latest spec

buffer-indexof-polyfill

This is a polyfill for Buffer#indexOf introduced in NodeJS 4.0.

is-function

is that thing a function? Use this module to find out

string.prototype.padend

ES2017 spec-compliant String.prototype.padEnd shim.

listenercount

backwards compatible version of builtin events.listenercount

marky

Performance timer based on performance.mark() and measure()

array.prototype.map

An ES5 spec-compliant `Array.prototype.map` shim/polyfill/replacement that works as far down as ES3.

@react-native/js-polyfills

Polyfills for React Native.

scroll-into-view-if-needed

Ponyfill for upcoming Element.scrollIntoView() APIs like scrollMode: if-needed, behavior: smooth and block: center

iterall

Minimal zero-dependency utilities for using JavaScript Iterables in all environments.

set-immediate-shim

Simple setImmediate shim

array.prototype.find

Array.prototype.find ES6 polyfill.

es6-map

ECMAScript6 Map polyfill

capture-stack-trace

Error.captureStackTrace ponyfill

typedarray.prototype.slice

ES spec-compliant shim for TypedArray.prototype.slice

array.prototype.toreversed

An ESnext spec-compliant `Array.prototype.toReversed` shim/polyfill/replacement that works as far down as ES3.

array-from

A ponyfill for the ES 2015 (ES6) `Array.from()`.

webcrypto-core

Common layer to be used by crypto libraries based on WebCrypto API for input validation.

async-listener

Polyfill exporting trevnorris's 0.11+ asyncListener API.

es6-object-assign

ECMAScript 2015 (ES6) Object.assign polyfill and ponyfill

launchdarkly-eventsource

Fork of eventsource package - W3C compliant EventSource client for Node.js and browser (polyfill)

broadcast-channel

A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers, NodeJs, Deno and iframes

@zxing/text-encoding

Polyfill for the Encoding Living Standard's API.

any-observable

Support any Observable library and polyfill

string.fromcodepoint

A robust & optimized `String.fromCodePoint` polyfill, based on the ECMAScript 6 specification.

es-aggregate-error

ES Proposal spec-compliant shim for AggregateError

promise.allsettled

ES Proposal spec-compliant shim for Promise.allSettled

create-react-context

Polyfill for the proposed React context API

node-polyfill-webpack-plugin

Polyfill Node.js core modules in Webpack.

array.prototype.filter

An ES5 spec-compliant `Array.prototype.filter` shim/polyfill/replacement that works as far down as ES3.

path2d

Path2D API for node. Can be used for server-side rendering with canvas

@formatjs/intl-displaynames

Polyfill for: https://tc39.es/proposal-intl-displaynames

@ungap/promise-all-settled

A cross platform Promise.allSettled polyfill

promise.prototype.finally

ES Proposal spec-compliant shim for Promise.prototype.finally

es5-shim

ECMAScript 5 compatibility shims for legacy JavaScript engines

string.prototype.trimright

ES2019 spec-compliant String.prototype.trimLeft shim.

string.prototype.padstart

ES2017 spec-compliant String.prototype.padStart shim.

symbol.prototype.description

Spec-compliant shim for Symbol.prototype.description proposal.

react-native-get-random-values

A small implementation of `crypto.getRandomValues` for React Native. This is useful to polyfill for libraries like [uuid](https://www.npmjs.com/package/uuid) that depend on it.

string.prototype.trimleft

ES2019 spec-compliant String.prototype.trimLeft shim.

react-native-url-polyfill

A lightweight and trustworthy URL polyfill for React Native

reflect.ownkeys

ES2015 spec-compliant shim for Reflect.ownKeys

@hypnosphi/create-react-context

Polyfill for the proposed React context API

array-find

ES6 Array.find ponyfill. Return the first array element which satisfies a testing function.

path2d-polyfill

Polyfills Path2D api for canvas rendering

fake-indexeddb

Fake IndexedDB: a pure JS in-memory implementation of the IndexedDB API

@edge-runtime/ponyfill

A ponyfill (doesn't overwrite the native methods) to use Edge Runtime APIs in any environment.

fastestsmallesttextencoderdecoder

The fastest smallest Javascript polyfill for the encode of TextEncoder and decode of TextDecoder for UTF-8 only. Made by AnonyCo with ❤️ from 🐕s.

string.prototype.codepointat

A robust & optimized `String.prototype.codePointAt` polyfill, based on the ECMAScript 6 specification.

find-index

finds an item in an array matching a predicate function, and returns its index

event-source-polyfill

A polyfill for http://www.w3.org/TR/eventsource/

intl

Polyfill the ECMA-402 Intl API (except collation)

well-known-symbols

An ESnext spec-compliant shim/polyfill/replacement for all Well-Known Symbols that works in any environment with Symbols.

smoothscroll-polyfill

Smooth Scroll behavior polyfill

null-check

Ensure a path doesn't contain null bytes

is-integer

ES2015 (ES6) Number.isInteger polyfill

url-search-params-polyfill

a simple polyfill for javascript URLSearchParams

document.contains

Polyfill/shim for `document.contains`

@borewit/text-codec

Text Decoder

@nevware21/ts-utils

Comprehensive TypeScript/JavaScript utility library with cross-environment support (Node.js, browser, web worker) providing helper functions, polyfills (ES5-ES2023), type checking utilities, and optimized implementations for better minification and code r

@sanity/eventsource

EventSource polyfill for browser and node.js

@stdlib/utils-get-prototype-of

Return the prototype of a provided object.

classlist-polyfill

Cross-browser JavaScript shim that fully implements element.classList (referenced on MDN)

weakmap-polyfill

ECMAScript6 WeakMap polyfill

custom-event-polyfill

A polyfill for creating CustomEvents on IE9+ if the native implementation is missing.

@formatjs/intl-numberformat

Ponyfill for ES2020 Intl.NumberFormat

messageformat

Intl.MessageFormat / Unicode MessageFormat 2 parser, runtime and polyfill

@formatjs/intl-pluralrules

Polyfill for Intl.PluralRules

@stdlib/fs-exists

Test whether a path exists on the filesystem.

monitor-event-loop-delay

Polyfill for perf_hooks.monitorEventLoopDelay(...)

esbuild-plugins-node-modules-polyfill

Polyfills nodejs builtin modules and globals for the browser.

blob-polyfill

Blob.js implements the W3C Blob interface in browsers that do not natively support it.

eventsource-polyfill

A browser polyfill for W3C EventSource (http://www.w3.org/TR/eventsource/)

mouse-change

Mouse state change listener

mouse-event

Cross browser mouse event property access

web-animations-js

JavaScript implementation of the Web Animations API

@formatjs/intl-datetimeformat

Intl.DateTimeFormat polyfill

objectFitPolyfill

A Javascript polyfill for browsers that don't support the object-fit CSS property

@webcomponents/shadycss

Polyfill for Scoped CSS

@ungap/url-search-params

The URLSearchParams polyfill.

@webcomponents/custom-elements

HTML Custom Elements Polyfill

resize-observer

An implementation and polyfill of the Resize Observer draft.

array.prototype.every

An ES5 spec-compliant `Array.prototype.every` shim/polyfill/replacement that works as far down as ES3.

@webcomponents/webcomponentsjs

Web Components Polyfills

element-closest

Return the closest element matching a selector up the DOM tree

@ungap/with-resolvers

Promise.witResolvers() polyfill

clipboard-polyfill

A polyfill for the asynchronous clipboard API

@luma.gl/gltools

WebGL2 API Polyfills for WebGL1 WebGLRenderingContext

eme-encryption-scheme-polyfill

A polyfill for the encryptionScheme field in EME

promise.any

ES 2021 spec-compliant shim for Promise.any

css-vars-ponyfill

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

regexp.escape

A robust ES3-compatible polyfill for the `RegExp.escape` proposal - see https://github.com/tc39/proposal-regex-escaping

construct-style-sheets-polyfill

Constructible style sheets/adopted style sheets polyfill

smooth-scroll-into-view-if-needed

Ponyfill for smooth scrolling elements into view (if needed!)

@toruslabs/broadcast-channel

A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers

visibilityjs

Wrapper for the Page Visibility API

wicg-inert

A polyfill for the proposed inert API

barcode-detector

A Barcode Detection API polyfill that uses ZXing webassembly under the hood

proxy-polyfill

Polyfill for the Proxy object

object-fit-images

Polyfill object-fit and object-position on images on IE9, IE10, IE11, Edge, Safari, ...

@deno/shim-deno

Deno namespace shim for Node.js

navigator.sendbeacon

Polyfill for navigator.sendBeacon()

array.prototype.foreach

An ES spec-compliant `Array.prototype.forEach` shim/polyfill/replacement that works as far down as ES3.

ember-cached-decorator-polyfill

Polyfill for RFC 566: @cached

array.prototype.at

An ES-spec-compliant (proposed) Array.prototype.at shim/polyfill/replacement that works as far down as ES3

ember-destroyable-polyfill

Polyfill for RFC 580: Destroyables

@ant-design/create-react-context

A fork of create-react-context in MIT license

function.name-polyfill

Polyfill for the basic functionality of `Function.name` accessor property in its pre-ES6 form

object.getprototypeof

An ES5 mostly-spec-compliant `Object.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible

keyboardevent-key-polyfill

polyfill for `KeyboardEvent.prototype.key`

ember-cli-typescript-blueprint-polyfill

A polyfill for Ember CLI's TypeScript blueprint capabilities.

error-polyfill

Javascript Error Polyfill

@bloomberg/record-tuple-polyfill

A polyfill for the Record and Tuple Stage 2 ECMAScript proposal.

string.prototype.startswith

A robust & optimized `String.prototype.startsWith` polyfill, based on the ECMAScript 6 specification.

frontend-collective-react-dnd-scrollzone

A cross browser solution to scrolling during drag and drop.

animation-frame-polyfill

Polyfill requestAnimationFrame and cancelAnimationFrame

ts-replace-all

This package includes the [core-js](https://github.com/zloirock/core-js) polyfill for `String#replaceAll`, along with TypeScript typings.

@oddbird/popover-polyfill

Popover Attribute Polyfill

seamless-scroll-polyfill

Smooth Scroll behavior polyfill

audio-recorder-polyfill

MediaRecorder polyfill to record audio in Edge and Safari

sugar

A Javascript utility library for working with native objects.

postcss-flexibility

PostCSS plugin for Flexibility polyfill

element-internals-polyfill

A polyfill for the element internals specification

focus-options-polyfill

JavaScript polyfill for the WHATWG spec of focusOptions, that enables a set of options to be passed to the focus method.

mq-polyfill

CSSOM-valid and jsdom/Jest-compatible matchMedia polyfill for server-side unit tests

ember-assign-polyfill

A polyfill for Ember.assign in <= 2.4

canvas-roundrect-polyfill

CanvasRenderingContext2D.roundRect() and Path2D.roundRect() polyfill

core-js-bundle

Standard library

transit-js

Transit is a data format and a set of libraries for conveying values between applications written in different languages. This library provides support for marshalling Transit data to/from Javascript.

flexibility

A JavaScript polyfill for Flexbox

es6-promise-polyfill

Polyfill for ES6 Promise

mdn-polyfills

MDN polyfills

element-matches

Super small `Element.matches` fix for older browsers (IE 9+, Edge 12+, Safari, Android browsers)

es7-shim

ECMAScript 7 compatibility shims for legacy JavaScript engines

random-poly-fill

A polyfill for crypto.randomFill and crypto.randomFillSync from Node.js core

scroll-behavior-polyfill

A polyfill for the 'scroll-behavior' CSS-property

element-closest-polyfill

A minimal polyfill for Element.closest

utils-indexof

Returns the first index at which a given element can be found.

@cto.af/textdecoder

Quick wrapper that finds TextDecoder or polyfills a bad implementation

stickyfilljs

Polyfill for CSS `position: sticky`

form-request-submit-polyfill

<form>.requestSubmit() polyfill

babel-plugin-array-includes

Replaces `arr.includes(val)' with `arr.indexOf(val) >= 0`.

fullscreen-api-polyfill

W3C's Fullscreen API Polyfill

mobile-drag-drop

Polyfill for making HTML5 drag and drop possible in all browsers.

node-inspect-extracted

Node's util.inspect, extracted for use on the Web

@stdlib/math-base-special-trunc

Round a double-precision floating-point number toward zero.

@stdlib/utils-index-of

Return the first index at which a given element can be found.

@perf-tools/performance

User Timing polyfill

@expo/browser-polyfill

Browser polyfill for making React Native compatible with web libs like pixi.js, three.js, phaser.js

object-assign-polyfill

Simple ES6 Object.assign() polyfill for older environments.

svgxuse

A polyfill that fetches external SVGs referenced in use elements when the browser itself fails to do so.

iterator-helper

Provide helpers that polyfill all methods defined in [iterator helpers proposal](https://github.com/tc39/proposal-iterator-helpers), both for `Iterator` and `AsyncIterator`, and even more.

string.prototype.endswith

A robust & optimized `String.prototype.endsWith` polyfill, based on the ECMAScript 6 specification.

@ungap/custom-elements

All inclusive customElements polyfill for every browser

webassemblyjs

WebAssembly interpreter

@4lolo/resize-observer-polyfill

A polyfill for the Resize Observer API

object.entries-ponyfill

`Object.entries()` ponyfill

error-cause

An ES-spec-compliant shim/polyfill/replacement for the `.cause` property on all Error types that works as far down as ES3

parsleyjs

Validate your forms, frontend, without writing a single line of javascript!

stream.finished

Polyfill/shim for stream.finished in node versions < v10

@webcomponents/scoped-custom-element-registry

Scoped CustomElementRegistry Polyfill

@ungap/event-target

An EventTarget polyfill

details-element-polyfill

HTML <details> element polyfill

ts-polyfill

Runtime polyfills for TypeScript libs, powered by core-js!

dynamic-import-polyfill

A polyfill for the native import() in the browser

fetch-readablestream

Compatibility layer for efficient streaming of binary data using [WHATWG Streams](https://streams.spec.whatwg.org/)

@oddbird/css-anchor-positioning

Polyfill for the proposed CSS anchor positioning spec

react-anchor-link-smooth-scroll

React component for anchor links using the smoothscroll polyfill.

stream.pipeline-shim

Polyfill/shim for stream.pipeline in node versions < v10

polyfill-object.fromentries

Object.fromEntries() polyfill

es-set

An ES-spec-compliant Set shim/polyfill/replacement that works as far down as ES3

disposablestack

An ESnext spec-compliant `DisposableStack`, `AsyncDisposableStack`, `Symbol.dispose`, and `Symbol.asyncDispose` shim/polyfill/replacement that works as far down as ES3.