Polyfill Packages

Node.js 0.12 fs.access() & fs.accessSync() ponyfill

Ensure a path doesn't contain null bytes

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

Polyfill the ECMA-402 Intl API (except collation)

ECMAScript 2015 (ES6) Object.assign polyfill and ponyfill

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

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

Smooth Scroll behavior polyfill

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

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

Polyfill/shim for `document.contains`

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.

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

Node.js `http.STATUS_CODES` ponyfill

a simple polyfill for javascript URLSearchParams

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

Node.js 0.12 util.debuglog() ponyfill

Ponyfill for intl unified numberformat proposal

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

HTML <details> element polyfill