APIs

Library for creation web and websocket restful APIs

Safer Node.js Buffer API

An implementation of the WHATWG URL Standard's URL API and parsing machinery

Node.js Buffer API, for the browser

A common tooling library used by the googleapis npm module. You probably don't want to use this directly.

A light-weight module that brings Fetch API to node.js

Get callsites from the V8 stack trace API

Core istanbul API for JS code coverage

Modern Buffer API polyfill without footguns

Google APIs Client Library for Node.js

Axios + standardized errors + request/response transforms.

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

Fast, unopinionated, minimalist web framework

ES6 spec-compliant RegExp.prototype.flags shim.

Load node modules according to tsconfig paths, in run-time or via API.

**Note:** More details on user side API can be found in [Jest documentation](https://jestjs.io/docs/mock-function-api).

Base reporting library for istanbul

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

ECMAScript spec-compliant polyfill/shim for `globalThis`

Utility functions for working with TypeScript's API. Successor to the wonderful tsutils. 🛠️️

ES5 spec-compliant shim for String.prototype.trim

ES2017 spec-compliant Object.values shim.

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

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

ES spec-compliant shim for ArrayBuffer.prototype.slice

Node.js API (Node-API)

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

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

ES proposal-spec-compliant Object.fromEntries shim.

Common API errors

Esprima-compatible implementation of the Mozilla JS Parser API

ES2017 spec-compliant Object.entries shim.

Packages @jridgewell/trace-mapping and @jridgewell/gen-mapping into the familiar source-map API

Fast CSS Selectors API Engine

Implements https://w3c.github.io/accname/

A high-level API to automate web browsers

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

A high-level API to automate web browsers

2KB immutable date time library alternative to Moment.js with the same modern API

Shared TypeScript definitions for Octokit projects

A shim for the setImmediate efficient script yielding API

In-memory file-system with Node's fs API.

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

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

Universal WHATWG Fetch API for Node, Browsers and React Native

Provides functions for detecting if the host environment supports the WebCrypto API

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

Public API for OpenTelemetry

tiny modular DOM lib for ie9+

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