JavaScript > Ponyfills

The entire standard library.

Promise

Map

WeakMap

Set

Symbol

RegExp

globalThis

BigInt

Number.isNaN

Number.isFinite

Number.isInteger

Array.prototype.indexOf.

Array.from

Array.prototype.every

Array.prototype.find

Array.prototype.some

Array.prototype.flatMap

Array.prototype.map

Array.prototype.forEach

Array.prototype.includes

Array.isArray

String.prototype.trim

String.prototype.trimStart

String.prototype.trimEnd

String.prototype.replaceAll

Object.fromEntries

Object.entries

Object.keys

Object.values

Object.assign

Object.is

JSON

fetch

Blob

FormData

AbortController

PerformanceObserver

performance.now

console.table

Bluetooth

ResizeObserver

crypto

CSS variables/custom properties

requestAnimationFrame

XMLHttpRequest

EventEmitter

setImmediate

Buffer.from

process.exit

process.nextTick