JSPM

Flood Element is a browser based load generation tool for easily testing modern web application performance

Public API for OpenTelemetry

Utilities.

Use Ky in both Node.js and browsers

Detect Browser, Engine, OS, CPU, and Device type/model from User-Agent & Client Hints data. Supports browser & node.js environment

High performance (de)compression in an 8kB package

Universal WHATWG Fetch API for Node, Browsers and React Native

the path module from node core for browsers

Microsoft Azure SDK for JavaScript - Aborter

Lightweight browser detector

in memory localStorage polyfill for node.js utilizing ES6 proxies

JWA, JWS, JWE, JWT, JWK, JWKS for Node.js, Browser, Cloudflare Workers, Deno, Bun, and other Web-interoperable runtimes

Convert a typed array to a Buffer without a copy

JavaScript's functional programming helper library.

A powerful command-line interface for automating Chrome browser using Playwright. Perfect for web scraping, automation, testing, and browser workflows.

Media-Mock is a JavaScript library that simulates media devices (like webcams) in web applications, allowing developers to test and debug media constraints, device configurations, and stream functionality without needing physical devices. This is particul

Library to work against complex domain names, subdomains and URIs.

atob for Node.JS and Linux / Mac / Windows CLI (it's a one-liner)

Parse and stringify URL query strings

<!-- markdownlint-disable MD024 -->

Get the bundle identifier of the default browser (macOS). Example: com.apple.Safari

Check which JavaScript environment your code is running in at runtime: browser, Node.js, Bun, etc

Utility for mocking XMLHttpRequest.

Better `os.arch()` for node and the browser -- detect OS architecture

The assert module from Node.js, for the browser.

A simple, lightweight JavaScript API for handling cookies

Exports a jsdom window object.

Get the default browser

Super simple browser testing influenced by testling and smokestack

https module compatability for browserify

HTML5 `FormData` for Browsers and Node.

Decode JWT tokens, mostly useful for browser applications.

A better opn. Reuse the same tab on Chrome for 👨‍💻.

JSON without touching any globals

Parse milliseconds into an object

Random number generator for browsers and node.js

Chai plugin for JSON Schema v4

the tty module from node core for browsers

node's constants module for the browser

E2E Testing Reinvented with AI - A powerful TypeScript browser automation framework using AI-powered testing with LangChain, OpenAI GPT-4o, and Playwright

Isomorphic implementation of WebSocket

vm module for the browser

timers module for browserify

A polyfill for the Resize Observer API

Node's domain module for the web browser. This is merely an evented try...catch with the same API as node, nothing more.

Compare semver version strings to find greater, equal or lesser.

btoa for Node.JS (it's a one-liner)

Lazy assertions without performance penalty

Collection of samples useful in testing IOTA modules.

Toggle current selected content in browser

Copy stuff into clipboard using JS with fallbacks

Promisify an event by waiting for it to be emitted

Microsoft Azure SDK for JavaScript - Logger

Chromium binaries for Node.js projects

Converts a Web-API readable-stream into a Node.js readable-stream.

Evaluate Javascript in PhantomJS, and print the output.

Auto mock all localstorage and sessionstorage APIs for your Vitest tests

OpenTelemetry Zipkin Exporter allows the user to send collected traces to Zipkin.

An alias package for `crypto.randomBytes` in Node.js and/or browsers

resolve which handles browser field support in package.json

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

Isomorphic client library for supporting long-running operations in node.js and browser.

OpenTelemetry Collector Trace Exporter allows user to send collected traces to the OpenTelemetry Collector

High Level DOM Assertions for QUnit

Apple's property list parser/builder for Node.js and browsers

React Browser Tests is a browser first testing library. The tests are written in React and run in a browser. Terminal also works.

Get a KeyboardEvent.key-style string from an event

Framework-agnostic, micro-library for getting stack traces in all environments

date / time comparison matchers for chai

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

OpenTelemetry Collector Metrics Exporter allows user to send collected metrics to the OpenTelemetry Collector

(recursive)? merging of (cloned)? objects.

Microsoft Azure Storage SDK for JavaScript - Blob

Cross-browser `CustomEvent` constructor

Check if a value is a natural number

Tiny and elegant HTTP client based on the Fetch API

Simple wrapper for cross-browser usage of the JavaScript Fullscreen API, which lets you bring the page or any element into fullscreen.

Check if a value is an `Error` instance

Isomorphic WebSocket

OpenTelemetry Collector Logs Exporter allows user to send collected logs to the OpenTelemetry Collector

DOM assertions for the Chai assertion library using vanilla JavaScript

JavaScript SVG parser and renderer on Canvas.

The Backbone Framework

Adapter that integrates @serenity-js/web with the latest stable version of WebdriverIO, enabling Serenity/JS reporting and using the Screenplay Pattern to write web and mobile test scenarios

The node.js assert module, re-packaged for web browsers.

Detects where the current browser extension code is being run. Compatible with Firefox, Chrome and derivates.

UMD __dirname and __filename browser shim

🔥 An extremely fast and efficient LRU cache for JavaScript with high compatibility (including Browsers) — 6.8KB.

Spies for the Chai assertion library.

LRU and FIFO caches for Client or Server

Serializes any DOM node into a String

Topological sort of directed acyclic graphs (like dependecy lists)

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Low-Level OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

An implementation of https://github.com/emberjs/rfcs/pull/726

Shallow deep equal assertion for chai

React's ExecutionEnvironment module extracted for use in other packages & components

A JavaScript library to zip and unzip files in the browser, Deno and Node.js

HKDF with no dependencies using runtime's native crypto

Dynamic script loading for browser

Plugin for loglevel message prefixing

A tool to get browser's scrollbars width.

browser-side require() the node way

A package that contains an array of every single file extension there is for text files

Extends Chai with lint-friendly terminating assertions.

A package that contains an array of every single file extension there is for binary files

Tests if ES6 Symbol is supported.

All-in-one open source e2e testing framework, with low-code recorder, runner + batteries built-in.

DOMParser.parseFromString for XML with IE8 fallback

A framework for mocking the FileMaker webviewer window object for developing and testing fm webviewer apps in browser.

Check whether operating system CPU architecture is 64-bit or 32-bit (Supports browsers)

Tests if ES6 @@toStringTag is supported.

Isomorphic client library for Azure KeyVault's keys.

Smallest/simplest possible means of using btoa with both Node and browserify

Adds console.table method that prints an array of objects as a table in console

A tiny (230B) and fast UUID (v4) generator for Node and the browser

Determine if a filename and/or buffer is text or binary. Smarter detection than the other solutions.

Creates an async iterator for a variety of inputs in the browser and node. Supports fetch, node-fetch, and cross-fetch

walk the dependency graph to generate json output that can be fed into browser-pack

Array#filter for older browsers.

Check in which environment the code is running - browser/node.js/webworker/jsdom/deno

sort module-deps output for deterministic browserify bundles

Detect default web browser of the current user, cross-platform (Win/Lin/Mac)

Unpack a browser type and version from the useragent string

The simplest unit testing framework possible.

Image structural similarity (SSIM). In TypeScript/JavaScript. For browser/server.

XMLHttpRequest emulation for node.js

Simple JS stack with auto run for node and browsers

Smart IPFS gateway selector with latency testing and fallback logic (vanilla JS)

Light-weight EventEmitter (less than 1KB when gzipped)

A generated SDK for WebSiteManagementClient.

Simulates a global browser environment using jsdom

Browser compatibility data provided by MDN Web Docs

A browser and nodeJS compatible plugin that allows to generate GraphQL Queries and Variables

Node standard library for browser.

LambdaTest Rest Client for Node.js

A high-performance, lightweight LRU cache. Built for developers who need fast caching without compromising on features.

pack node-style source files from a json stream into a browser bundle

A mock browser with window, document, location, navigation, local and session storage to use for client side code tests in a node environment.

Analyze and debug space usage through source maps

Super light and fast Extensible ES6+ events and EventEmitters for Node and the browser. Easy for any developer level, use the same exact code in node and the browser. No frills, just high speed events!

Flmngr file manager (Local disk / Amazon S3 / Azure Blob)

A generated SDK for ResourceManagementClient.

Detect device type and render your component according to it

Get the paths of edge browser easily

HMAC-based (HOTP) and Time-based (TOTP) One-Time Password library

Minimal JavaScript module loader

JavaScript UI component for displaying audio waveforms

Create a MD5 hash with hex encoding

`[].map(f)` for older browsers

Provides access to the system's web browser and supports handling redirects. On iOS, it uses SFSafariViewController or ASWebAuthenticationSession, depending on the method you call, and on Android it uses ChromeCustomTabs. As of iOS 11, SFSafariViewControl

Tiny local JSON database for Node, Electron and the browser

CSS base styles

Isomorphic client Runtime for Typescript/node.js/browser javascript client libraries generated using AutoRest

Cross Platform implementation of the GitLab API

utilities for parsing shorthand Selenium capabilities objects

A lightweight, flexible and based testing library for JS

OpenTelemetry instrumentation for fetch http client in web browsers

Mouse wheel normalization across multiple multiple browsers.

Browser port of the Node.js 'request' package

Library to work against complex domain names, subdomains and URIs. Only contains ICANN section.

Check if mobile browser.

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Test whether value is error object

File manager plugin for CKEditor 5

Detect default web browser of the current user, cross-platform (Win/Lin/Mac)

Smallest/simplest possible means of using atob with both Node and browserify

Fastest, most accurate & effecient user agent string parser, uses Browserscope's research for parsing

Promptbook: Run AI apps in plain human language across multiple models and platforms

A Minimalistic Wrapper for IndexedDB

A simple and small testing suite for javascript, both browser and node.js

Open a URL via the operating system (http: in default browser, mailto: in mail client etc.

the stream module from node core for browsers

A function to get the scrolling parent of an html element.

Simple JS queue with auto run for node and browsers

Lint browser compatibility of API used

Simple JS queue with auto run for node and browsers

Copy text to the clipboard in modern browsers (0.2 kB)

support for asynchronous development with a Promise based task Scheduler, several different Promise implementations (synchronous, idle, asynchronous and native runtime wrappers), await helpers, and aliases all built and tested using TypeScript.

Adapter that integrates @serenity-js/web with WebdriverIO 8, enabling Serenity/JS reporting and using the Screenplay Pattern to write web and mobile test scenarios

Isomorphic client library for Azure KeyVault's secrets.

watch mode for browserify builds

Cross platform environment variables with process.env, window.name, location.hash and localStorage fallbacks

An extended Error class that envelops a parent error, such that the stack trace contains the causation

Detect Browser, Engine, OS, CPU, and Device type/model from User-Agent data. Supports browser & node.js environment

TaffyDB is an opensouce library that brings database features into your JavaScript applications.

A javascript scrollbar plugin that hides the native scrollbars, provides custom styleable overlay scrollbars, and preserves the native functionality and feel.

The speed of a single-page web application without having to write any JavaScript

Browser fingerprinting library with the highest accuracy and stability

Javascript audio library for the modern web.

The official Fullstory browser SDK

A promise controlled browser ideal for testing

Run textlint rule on browser for testing.

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

The #1 HTML sanitizer - 100% security success rate AND fastest performance. Outperforms DOMPurify, js-xss, bleach-js and all competitors in comprehensive testing.

Google's libphonenumber pre-compiled with the closure compiler

the part of vue-inbrowser-compiler-utils that contains no vue dependency

A powerful browser based unit testing user interface.

A modern logging library for Node.js and modern browsers that provides log level mapping to the console

Mixpanel Cordova Plugin for iOS, Android and Browser Platforms

Lightweight copy to clipboard for the web

Logger Utils

Lightning fast hash functions for browsers and Node.js using hand-tuned WebAssembly binaries (MD4, MD5, SHA-1, SHA-2, SHA-3, Keccak, BLAKE2, BLAKE3, PBKDF2, Argon2, bcrypt, scrypt, Adler-32, CRC32, CRC32C, RIPEMD-160, HMAC, xxHash, SM3, Whirlpool)

Environment utilities

Check version ranges like `>=N` and `X || Y || Z` with support for Node.js, Web Browsers, Deno, and TypeScript.

Normalize browsers' default style

Lint CSS for browser support against caniuse database

Fast, generic and type safe router (match method and path).

Compress images in the browser

Isomorphic/Universal WHATWG URL API with some support legacy node URL API

A pure JavaScript client for the tus resumable upload protocol

Oboe.js reads json, giving you the objects as they are found without waiting for the stream to finish

Nightwatch.js plugin for Cucumber.js

provides locking mechanism to sync across browser tabs

Insanely fast, full-stack, headless browser testing using Node.js

Chai assertions for iterable objects

Package for encoding / decoding images, transforming images, applying filters, drawing primitives on images on the client side (no need for server Node.js)

Disallow features that are unsupported by the browsers that you are targeting

jsonp minimal client for the browser (1.4K) and Node.js

Tiny hashing module that uses the native crypto API in Node.js and the browser

Faro instrumentations, metas, transports for web.

Populate a <canvas> element with a font texture atlas

Extend Chai Assertion library with tests for superagent requests

Morph a DOM tree to another DOM tree (no virtual DOM needed)

Microsoft Azure Storage SDK for JavaScript - Queue

Small module for fitting a canvas element within the bounds of its parent.

Chromium Binary for Serverless Platforms

Node's path builtin module exposed as dual ESM/CJS and browser-compatible out of the box.

Check if a value is a `Blob`

AWS X-Ray ID generator for OpenTelemetry

browserify compatible version of the ace editor.

Automated Functional Testing (AFT) package supporting UI testing in mobile apps with support for BrowserStack, Sauce Labs and Local Appium

UI utilities

Consistent cross browser mouse wheel movement

small function to append a query string to a URL

Creates a local connection to CrossBrowserTesting.com which allows you to test sites behind your firewall or to access web pages that are saved locally on your machine. In just a few seconds, you can establish a connection which allows you to do live test

Cascading grid layout library

tiny http client for Node and the browser

Get the size of an element in pixels, including margins

Check if browser is Firefox

Check if browser is Internet Explorer

Text utilities for SUIT CSS

Advanced HTTP requests in node.js and browsers

Get a list of objects describing the OS and browser platforms on Sauce Labs using "zuul" format

Manage unstructured data using DataSet. Add, update, and remove data, and listen for changes in the data.

insert a string of css into the <head>

A companion library to openai for Azure OpenAI.

Mouse wheel normalization across multiple multiple browsers.