JSPM

An isomorphic client library for the text analysis features in the Azure Cognitive Language Service.

Useragent analysis tool.

Easy-to-use and high-performance JavaScript library for data analysis. Works with tabular and geospatial data.

WebAssembly-powered temporal analysis toolkit - DTW, LCS, scheduling, and meta-learning

SDK for WorkAI API - AI-powered code analysis with WorkCoins billing system

A tool for geotech analysis.

A tool for statistical analysis.

Static analysis to detect browser compatiblity issues in JavaScript and HTML.

Eye Analysis - Browser-based eye tracking and screen recording library for research and experiments

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Complete technical analysis suite - 189 indicators, risk metrics, pattern recognition. Native + WASM backends for Node.js AND Browser

High-performance technical analysis library - Native + WASM backends, 158+ TA-Lib compatible indicators, works in Node.js AND Browser

A tool for geotech analysis.

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

A powerful suite of 36 development and analysis tools for browser automation and web application analysis.

Lightweight yet powerful audio analysis library

Smart video analysis in 3 lines of code. TypeScript-first, privacy-focused, zero-cost.

A JavaScript library for intelligent network-aware data compression with real-time performance analysis

A tool for data PCA(Principle Component Analysis) and cluster(K-Means & K-Medoids).

Identifyzer is a lightweight JavaScript library for creating unique browser fingerprints, enabling secure user identification and behavior analysis.

rslint core library

MCP server for browser automation, inspection, monitoring, and performance analysis

The string_decoder module from Node core

Browser-friendly inheritance fully compatible with standard node.js inherits()

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

Array#isArray for older browsers

Node.js Buffer API, for the browser

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

Promise based HTTP client for the browser and node.js

ES2015 `Object.assign()` ponyfill

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

Determine if an object is a Buffer

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

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

Base class for node which OpenTelemetry instrumentation modules extend

A powerful suite of 36 development and analysis tools for browser automation and web application analysis.

Public logs API for OpenTelemetry

ContentSafety Service

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

Lightweight browser detector

Public API for OpenTelemetry

An isomorphic client library for the Azure Text Analytics service.

Universal WHATWG Fetch API for Node, Browsers and React Native

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

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

High performance (de)compression in an 8kB package

Microsoft Azure SDK for JavaScript - Aborter

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

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

the stream module from node core for browsers

MCP (Model Context Protocol) server for browser tools integration

the path module from node core for browsers

JavaScript library for DOM operations

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

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

Parse and stringify URL query strings

Get the default browser

A simple, lightweight JavaScript API for handling cookies

HTML5 `FormData` for Browsers and Node.

JavaScript's functional programming helper library.

Convert a typed array to a Buffer without a copy

node's constants module for the browser

Minimal lightweight logging for JavaScript, adding reliable log level methods to any available console.log methods

Random number generator for browsers and node.js

Parse milliseconds into an object

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

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

Decode JWT tokens, mostly useful for browser applications.

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

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

the tty module from node core for browsers

vm module for the browser

https module compatability for browserify

Copy stuff into clipboard using JS with fallbacks

JSON without touching any globals

A polyfill for the Resize Observer API

memlab API

Microsoft Azure SDK for JavaScript - Logger

timers module for browserify

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

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

Isomorphic implementation of WebSocket

Cypress is a next generation front end testing tool built for the modern web

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

Get a KeyboardEvent.key-style string from an event

Promisify an event by waiting for it to be emitted

Lazy assertions without performance penalty

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

Toggle current selected content in browser

resolve which handles browser field support in package.json

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

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

A lightweight, fast JavaScript/TypeScript library for detecting AI-generated text using advanced linguistic analysis. Works in Node.js, React, and browser environments with zero dependencies.

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

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

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

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

Tiny and elegant HTTP client based on the Fetch API

JavaScript SVG parser and renderer on Canvas.

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

Cross-browser `CustomEvent` constructor

Microsoft Azure Storage SDK for JavaScript - Blob

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

Check if a value is a natural number

Serializes any DOM node into a String

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

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

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

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

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

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

Plugin for loglevel message prefixing

LRU and FIFO caches for Client or Server

HKDF with no dependencies using runtime's native crypto

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

Isomorphic WebSocket

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

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

Topological sort of directed acyclic graphs (like dependecy lists)

Session recorder for Splunk Observability

Tests if ES6 Symbol is supported.

Dynamic script loading for browser

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

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

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

Unpack a browser type and version from the useragent string

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

A tool to get browser's scrollbars width.

browser-side require() the node way

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

Array#filter 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

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

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

Tests if ES6 @@toStringTag is supported.

DOMParser.parseFromString for XML with IE8 fallback

Isomorphic client library for Azure KeyVault's keys.

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

Extends Chai with assertions about promises.

Get the paths of edge browser easily

Browser compatibility data provided by MDN Web Docs

Node standard library for browser.

Minimal JavaScript module loader

Simple JS stack with auto run for node and browsers

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

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.

Detect device type and render your component according to it

sort module-deps output for deterministic browserify bundles

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

Analyze and debug space usage through source maps

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

File manager plugin for CKEditor 5

XMLHttpRequest emulation for node.js

Create a MD5 hash with hex encoding

Promptbook: Turn your company's scattered knowledge into AI ready books

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

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

Browser port of the Node.js 'request' package

Tiny local JSON database for Node, Electron and the browser

Mouse wheel normalization across multiple multiple browsers.

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

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

Cross Platform implementation of the GitLab API

Test whether value is error object

A client for working with the BrowserStack APIs.

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

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

OpenTelemetry instrumentation for fetch http client in web browsers

Isomorphic client library for Azure KeyVault's secrets.

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

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

Browser-native audio analysis library with 300+ functions, enhanced BPM detection, and dual demo experience (Astro + HTML BPM demo)

Check if mobile 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!

Logger Utils

JavaScript SDK for Go Analysis Server - Easy event tracking and analytics

tap-producing test harness for node and browsers

A generated SDK for ResourceManagementClient.

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

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Lint browser compatibility of API used

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

provides locking mechanism to sync across browser tabs

Simple JS queue with auto run for node and browsers

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

Browser fingerprinting library with the highest accuracy and stability

strings comparison matchers for chai

watch mode for browserify builds

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

A Minimalistic Wrapper for IndexedDB

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

Javascript audio library for the modern web.

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

A generated SDK for WebSiteManagementClient.

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.

The official Fullstory browser SDK

Environment utilities

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

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

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)

Cross browser Speech Synthesis

Give your JS App some Backbone with Models, Views, Collections, and Events.

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

Compress images in the browser

Google's libphonenumber pre-compiled with the closure compiler

Extend Chai Assertion library with tests for http apis

Lightweight copy to clipboard for the web

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

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

Lint CSS for browser support against caniuse database

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

tiny http client for Node and the browser

Simple JS queue with auto run for node and browsers

Trackter is a lightweight JavaScript library for creating unique browser fingerprints, enabling secure user identification and behavior analysis.

Useragent analysis tool.浏览器分析/浏览器检测/浏览器识别/浏览器判断/UA解析 - 用户代理、操作系统信息

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

A pure JavaScript client for the tus resumable upload protocol

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

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

Automatically opens your browser and iOS Simulator to preview Node.js email messages sent with Nodemailer. Made for Forward Email and Lad. Cross-browser and cross-platform email testing.

Check if a value is a `Blob`

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

Chromium Binary for Serverless Platforms

AWS X-Ray ID generator for OpenTelemetry

Normalize browsers' default style

Auto mock all localstorage and sessionstorage APIs for your Jest tests

A generated SDK for AzureAnalysisServices.

small function to append a query string to a URL

It is a lightweight rest client for node.js and the browser

Consistent cross browser mouse wheel movement

Render React components in Vitest Browser Mode

Check if browser is Internet Explorer

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

Utility library to determine and normalize Element.scrollLeft behavior

Strictly typed EventTarget that directly extends EventTarget to function as a drop-in replacement. It works with all Event-Types and accounts for basically no additional bundle-size.

UI utilities

browserify compatible version of the ace editor.

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

Faro instrumentations, metas, transports for web.

Populate a <canvas> element with a font texture atlas

Copy to clipboard.

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

Microsoft Azure Storage SDK for JavaScript - Queue

Browser running for Vitest using playwright

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