JSPM

Render Vue components in Vitest Browser Mode

Converts a source-map from/to different formats and allows adding/changing properties.

ES2015 `Object.assign()` ponyfill

Modern and minimalist testing library for the web

Extends Chai with assertions for the Sinon.JS mocking framework.

Automated browser testing for the modern web development stack.

The Node.js `util.deprecate()` function with browser support

Open stuff like URLs, files, executables. Cross-platform.

A proper monster for front-end automated testing

Determine if an object is a Buffer

Run TAP unit tests in 1789+ browsers

OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.

Serenity/JS test runner adapter for Playwright Test, combining Playwright's developer experience with the advanced reporting and automation capabilities of Serenity/JS

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

strings comparison matchers for chai

A library for parsing IPv4 and IPv6 IP addresses in node and the browser.

Render Svelte components in Vitest Browser Mode

Public logs API for OpenTelemetry

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

Public API for OpenTelemetry

Base class for node which OpenTelemetry instrumentation modules extend

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

Utilities.

Use Ky in both Node.js and browsers

the path module from node core for browsers

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

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

JavaScript's functional programming helper library.

Convert a typed array to a Buffer without a copy

Universal WHATWG Fetch API for Node, Browsers and React Native

in memory localStorage polyfill for node.js utilizing ES6 proxies

High performance (de)compression in an 8kB package

Microsoft Azure SDK for JavaScript - Aborter

Lightweight browser detector

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

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

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

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

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

Parse and stringify URL query strings

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

<!-- markdownlint-disable MD024 -->

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

Super simple browser testing influenced by testling and smokestack

Utility for mocking XMLHttpRequest.

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

A simple, lightweight JavaScript API for handling cookies

Exports a jsdom window object.

Get the default browser

HTML5 `FormData` for Browsers and Node.

Decode JWT tokens, mostly useful for browser applications.

https module compatability for browserify

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

Parse milliseconds into an object

Random number generator for browsers and node.js

Chai plugin for JSON Schema v4

JSON without touching any globals

Isomorphic implementation of WebSocket

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

timers module for browserify

the tty module from node core for browsers

vm module for the browser

node's constants module for the browser

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

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.

Lazy assertions without performance penalty

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

Toggle current selected content in browser

Collection of samples useful in testing IOTA modules.

Microsoft Azure SDK for JavaScript - Logger

Chromium binaries for Node.js projects

Promisify an event by waiting for it to be emitted

Evaluate Javascript in PhantomJS, and print the output.

Copy stuff into clipboard using JS with fallbacks

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

Auto mock all localstorage and sessionstorage APIs for your Vitest tests

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

resolve which handles browser field support in package.json

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

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

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

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

High Level DOM Assertions for QUnit

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

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

date / time comparison matchers for chai

Get a KeyboardEvent.key-style string from an event

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

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

Microsoft Azure Storage SDK for JavaScript - Blob

Cross-browser `CustomEvent` constructor

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

Check if a value is a natural number

Tiny and elegant HTTP client based on the Fetch API

Check if a value is an `Error` instance

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

Isomorphic WebSocket

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

JavaScript SVG parser and renderer on Canvas.

DOM assertions for the Chai assertion library using vanilla JavaScript

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 Backbone Framework

Spies for the Chai assertion library.

LRU and FIFO caches for Client or Server

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.

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

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

Serializes any DOM node into a String

Topological sort of directed acyclic graphs (like dependecy lists)

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

Shallow deep equal assertion for chai

Dynamic script loading for browser

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

A tool to get browser's scrollbars width.

HKDF with no dependencies using runtime's native crypto

browser-side require() the node way

Plugin for loglevel message prefixing

Extends Chai with lint-friendly terminating assertions.

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

DOMParser.parseFromString for XML with IE8 fallback

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

Tests if ES6 @@toStringTag is supported.

Tests if ES6 Symbol is supported.

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

Isomorphic client library for Azure KeyVault's keys.

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)

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

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

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

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.

sort module-deps output for deterministic browserify bundles

Array#filter for older browsers.

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

XMLHttpRequest emulation for node.js

The simplest unit testing framework possible.

LambdaTest Rest Client for Node.js

A generated SDK for WebSiteManagementClient.

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

Unpack a browser type and version from the useragent string

Simple JS stack with auto run for node and browsers

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

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

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

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

Simulates a global browser environment using jsdom

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!

Browser compatibility data provided by MDN Web Docs

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

Node standard library for browser.

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

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

JavaScript UI component for displaying audio waveforms

Analyze and debug space usage through source maps

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

Get the paths of edge browser easily

Detect device type and render your component according to it

A generated SDK for ResourceManagementClient.

Minimal JavaScript module loader

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

Create a MD5 hash with hex encoding

OpenTelemetry instrumentation for fetch http client in web browsers

CSS base styles

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

A lightweight, flexible and based testing library for JS

Check if mobile browser.

Tiny local JSON database for Node, Electron and the browser

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

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

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Mouse wheel normalization across multiple multiple browsers.

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

File manager plugin for CKEditor 5

Browser port of the Node.js 'request' package

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

A Minimalistic Wrapper for IndexedDB

Test whether value is error object

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

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

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

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

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

the stream module from node core for browsers

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

Simple JS queue with auto run for node and browsers

Lint browser compatibility of API used

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

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

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.

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

Isomorphic client library for Azure KeyVault's secrets.

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

Simple JS queue with auto run for node and browsers

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

watch mode for browserify builds

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

Browser fingerprinting library with the highest accuracy and stability

A promise controlled browser ideal for testing

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

Javascript audio library for the modern web.

Run textlint rule on browser for testing.

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

The official Fullstory browser SDK

A powerful browser based unit testing user interface.

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

Google's libphonenumber pre-compiled with the closure compiler

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

Mixpanel Cordova Plugin for iOS, Android and Browser Platforms

Lightweight copy to clipboard for the web

Logger Utils

Environment utilities

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

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

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)

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

Nightwatch.js plugin for Cucumber.js

A pure JavaScript client for the tus resumable upload protocol

Lint CSS for browser support against caniuse database

Compress images in the browser

Normalize browsers' default style

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

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

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

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

Chai assertions for iterable objects

provides locking mechanism to sync across browser tabs

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

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

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

Microsoft Azure Storage SDK for JavaScript - Queue

Extend Chai Assertion library with tests for superagent requests

Faro instrumentations, metas, transports for web.

AWS X-Ray ID generator for OpenTelemetry

Populate a <canvas> element with a font texture atlas

Chromium Binary for Serverless Platforms

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