JSPM

Advanced unique ID generation utility with multi-layer encoding, collision detection, and context-aware features

High-performance distributed unique ID generator based on Twitter's Snowflake algorithm. Supports ESM and CommonJS with BigInt for precision.

Unique ID for current browser (client).

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

Get the default browser

Browser unique signature (Fingerprint) generator

AWS X-Ray ID generator for OpenTelemetry

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

Easy library for generating unique passwords in browsers.

Array#isArray for older browsers

The string_decoder module from Node core

Bunch of useful filters for angularJS(with no external dependencies!)

Node.js Buffer API, for the browser

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

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

ES2015 `Object.assign()` ponyfill

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

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

Promise based HTTP client for the browser and node.js

Determine if an object is a Buffer

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

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

Public logs API for OpenTelemetry

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

Lightweight browser detector

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

Public API for OpenTelemetry

the path module from node core for browsers

Convert a typed array to a Buffer without a copy

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

Microsoft Azure SDK for JavaScript - Aborter

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

SDK for change control. Enable Git-like capabilities like versioning, history, and blame in apps and AI agents.

Universal WHATWG Fetch API for Node, Browsers and React Native

JavaScript library for DOM operations

the stream module from node core for browsers

High performance (de)compression in an 8kB package

Parse and stringify URL query strings

Parse milliseconds into an object

An isomorphic client library for the Azure Event Grid service.

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

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

timers module for browserify

A simple, lightweight JavaScript API for handling cookies

Decode JWT tokens, mostly useful for browser applications.

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

Random number generator for browsers and node.js

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

Microsoft Azure SDK for JavaScript - Logger

HTML5 `FormData` for Browsers and Node.

Isomorphic implementation of WebSocket

node's constants module for the browser

JSON without touching any globals

the tty module from node core for browsers

Toggle current selected content in browser

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

Copy stuff into clipboard using JS with fallbacks

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

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

A polyfill for the Resize Observer API

https module compatability for browserify

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

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

vm module for the browser

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

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

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

resolve which handles browser field support in package.json

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

Promisify an event by waiting for it to be emitted

A toolkit for deep structure manipulations, provides deep merge/clone functionality out of the box, and exposes hooks and custom adapters for more control and greater flexibility.

Get a KeyboardEvent.key-style string from an event

LRU and FIFO caches for Client or Server

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

Manage child views in a Backbone.View

Lazy assertions without performance penalty

JavaScript's functional programming helper library.

Microsoft Azure Storage SDK for JavaScript - Blob

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

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

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

Tiny and elegant HTTP client based on the Fetch API

Check if a value is a natural number

Cross-browser `CustomEvent` constructor

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

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.

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

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

Serializes any DOM node into a String

JavaScript SVG parser and renderer on Canvas.

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

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

Isomorphic WebSocket

Plugin for loglevel message prefixing

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

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

HKDF with no dependencies using runtime's native crypto

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

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

A tool to get browser's scrollbars width.

Dynamic script loading for browser

Isomorphic client library for Azure KeyVault's keys.

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

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

Extends Chai with assertions about promises.

Tests if ES6 @@toStringTag is supported.

Unpack a browser type and version from the useragent string

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

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

XMLHttpRequest emulation for node.js

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

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

Tests if ES6 Symbol is supported.

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

Topological sort of directed acyclic graphs (like dependecy lists)

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

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

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

browser-side require() the node way

Create a MD5 hash with hex encoding

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

Get the paths of edge browser easily

DOMParser.parseFromString for XML with IE8 fallback

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

Analyze and debug space usage through source maps

File manager plugin for CKEditor 5

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

Detect device type and render your component according to it

Array#filter for older browsers.

Node standard library for browser.

sort module-deps output for deterministic browserify bundles

Browser compatibility data provided by MDN Web Docs

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

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

Simple JS stack with auto run for node and browsers

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

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!

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

Minimal JavaScript module loader

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

Isomorphic client library for Azure KeyVault's secrets.

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

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

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

Tiny local JSON database for Node, Electron and the browser

Check if mobile browser.

A generated SDK for ResourceManagementClient.

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

Logger Utils

Mouse wheel normalization across multiple multiple browsers.

Lint browser compatibility of API used

OpenTelemetry instrumentation for fetch http client in web browsers

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

A client for working with the BrowserStack APIs.

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

Javascript audio library for the modern web.

strings comparison matchers for chai

Test whether value is error object

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

Browser port of the Node.js 'request' package

watch mode for browserify builds

Turn identifiers into global lookups that work in Node and the browser

A generated SDK for WebSiteManagementClient.

provides locking mechanism to sync across browser tabs

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Environment utilities

An isomorphic client library for the Azure Text Analytics service.

The official Fullstory browser SDK

tap-producing test harness for node and browsers

A Minimalistic Wrapper for IndexedDB

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

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

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

Cross Platform implementation of the GitLab API

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.

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

Simple JS queue with auto run for node and browsers

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

Browser fingerprinting library with the highest accuracy and stability

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

Compress images in the browser

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

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

Google's libphonenumber pre-compiled with the closure compiler

Extend Chai Assertion library with tests for http apis

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

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

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

Lint CSS for browser support against caniuse database

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)

Lightweight copy to clipboard for the web

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

Check if a value is a `Blob`

An AI web browsing framework focused on simplicity and extensibility.

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

Normalize browsers' default style

Get the size of an element in pixels, including margins

Simple JS queue with auto run for node and browsers

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

tiny http client for Node and the browser

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

small function to append a query string to a URL

Chromium Binary for Serverless Platforms

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 browser is Firefox

Auto mock all localstorage and sessionstorage APIs for your Jest tests

Mouse wheel normalization across multiple multiple browsers.

Browser running for Vitest using playwright

A dynamic, browser-based visualization library.

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

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

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.

Microsoft Azure Storage SDK for JavaScript - Queue

<!-- markdownlint-disable MD024 -->

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

Faro instrumentations, metas, transports for web.

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

Bitcoin Cash cashaddr address format support for Node.js and web browsers.

Consistent cross browser mouse wheel movement

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

A companion library to openai for Azure OpenAI.

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

Check if browser is Internet Explorer

A pure JavaScript client for the tus resumable upload protocol

Populate a <canvas> element with a font texture atlas

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

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

Utility library to determine and normalize Element.scrollLeft behavior

Implementation of the Server-sent events protocol for Node.js and browsers.

Sentence similarity algorithm.

browserify compatible version of the ace editor.

UI utilities

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

return all coordinates from a geojson object

Copy to clipboard.

a geographic extent object

A generated SDK for SubscriptionClient.

Faro web tracing implementation.

Use Ky in both Node.js and browsers

JS Library & ExpressJS user-agent middleware exposing

insert a string of css into the <head>

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

Test'em 'scripts! Javascript Unit testing made easy.

Javascript string formatter for human readability

memlab API

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

React hooks done right, for browser and SSR.