JSPM

A simple, lightweight JavaScript API for handling cookies

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

Utility for mocking XMLHttpRequest.

Super simple browser testing influenced by testling and smokestack

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

Get the default browser

Exports a jsdom window object.

HTML5 `FormData` for Browsers and Node.

Random number generator for browsers and node.js

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

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

node's constants module for the browser

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

A polyfill for the Resize Observer API

Lazy assertions without performance penalty

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

Collection of samples useful in testing IOTA modules.

Toggle current selected content in browser

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

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

resolve which handles browser field support in package.json

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

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.

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

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

Microsoft Azure Storage SDK for JavaScript - Blob

Cross-browser `CustomEvent` constructor

Check if a value is a natural number

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

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.

JavaScript SVG parser and renderer on Canvas.

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

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.

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

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

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

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

DOMParser.parseFromString for XML with IE8 fallback

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.

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

Isomorphic client library for Azure KeyVault's keys.

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

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

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

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

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

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

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.

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

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

Unpack a browser type and version from the useragent string

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

Simple JS stack with auto run for node and browsers

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

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.

Simulates a global browser environment using jsdom

Browser compatibility data provided by MDN Web Docs

Node standard library for browser.

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!

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

JavaScript UI component for displaying audio waveforms

Get the paths of edge browser easily

Detect device type and render your component according to it

Analyze and debug space usage through source maps

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

A generated SDK for ResourceManagementClient.

Minimal JavaScript module loader

Create a MD5 hash with hex encoding

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

OpenTelemetry instrumentation for fetch http client in web browsers

CSS base styles

A lightweight, flexible and based testing library for JS

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

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

Tiny local JSON database for Node, Electron and the browser

Check if mobile browser.

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

Cross Platform implementation of the GitLab API

Mouse wheel normalization across multiple multiple browsers.

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

utilities for parsing shorthand Selenium capabilities objects

`[].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

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

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

Lint browser compatibility of API used

Isomorphic client library for Azure KeyVault's secrets.

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

the stream module from node core for browsers

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

Simple JS queue with auto run for node and browsers

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

Simple JS queue with auto run for node and browsers

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)

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

Browser fingerprinting library with the highest accuracy and stability

watch mode for browserify builds

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

The official Fullstory browser SDK

Javascript audio library for the modern web.

A promise controlled browser ideal 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 part of vue-inbrowser-compiler-utils that contains no vue dependency

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

Run textlint rule on browser for testing.

A powerful browser based unit testing user interface.

Mixpanel Cordova Plugin for iOS, Android and Browser Platforms

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

Environment utilities

Logger Utils

Lightweight copy to clipboard for the web

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

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)

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

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

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

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

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

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

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

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

Chai assertions for iterable objects

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

provides locking mechanism to sync across browser tabs

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

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

UI utilities

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.

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

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

small function to append a query string to a URL

browserify compatible version of the ace editor.

Check if a value is a `Blob`

Consistent cross browser mouse wheel movement

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

Get the size of an element in pixels, including margins

Check if browser is Firefox

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

Check if browser is Internet Explorer

tiny http client for Node and the browser

Cascading grid layout library

Text utilities for SUIT CSS

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

Mouse wheel normalization across multiple multiple browsers.

Advanced HTTP requests in node.js and browsers

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

A companion library to openai for Azure OpenAI.

A jQuery plugin that adds cross-browser mouse wheel support.

JavaScript barcode generator supporting over 100 types and standards.

ExpressJS/Connect/TrinteJS user-agent middleware exposing

Faro web tracing implementation.

Device detection (phone, tablet, desktop, mobile grade, os, versions)

Read small to medium `*.xlsx` files in a browser or Node.js. Parse to JSON with a strict schema.

insert a string of css into the <head>

Change assertions for the Chai assertion library

Backbone assertions for the Chai assertion library

A generated SDK for ContainerInstanceManagementClient.

A regular expression that matches a CHANGELOG filename

Auth0 headless browser sdk

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

A lightweight library to decode and verify RS JWT meant for the browser.

Integration testing for the modern web

Pipe javascript into phantomjs, print the output, writing test coverage to disk along the way

React component to wrap your application or component in an iFrame for encapsulation purposes

Javascript string formatter for human readability

Fast client-side asset builder

A cross-browser wrapper for the Web Audio API which aims to closely follow the standard.