JSPM

The string_decoder module from Node core

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

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

Node.js Buffer API, for the browser

Array#isArray for older browsers

Promise based HTTP client for the browser and node.js

ES2015 `Object.assign()` ponyfill

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

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

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

Determine if an object is a Buffer

Public logs API for OpenTelemetry

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

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

Base class for node which OpenTelemetry instrumentation modules extend

High performance (de)compression in an 8kB package

Lightweight browser detector

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

Public API for OpenTelemetry

Universal WHATWG Fetch API for Node, Browsers and React Native

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

Microsoft Azure SDK for JavaScript - Aborter

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

Get the default browser

the stream module from node core for browsers

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

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

the path module from node core for browsers

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

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

Random number generator for browsers and node.js

https module compatability for browserify

JSON without touching any globals

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

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

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

JavaScript library for DOM operations

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

Parse and stringify URL query strings

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

Microsoft Azure SDK for JavaScript - Logger

Parse milliseconds into an object

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

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

node's constants module for the browser

timers module for browserify

Decode JWT tokens, mostly useful for browser applications.

Isomorphic implementation of WebSocket

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

the tty module from node core for browsers

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

vm module for the browser

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

A polyfill for the Resize Observer API

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

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

Toggle current selected content in browser

Copy stuff into clipboard using JS with fallbacks

resolve which handles browser field support in package.json

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

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

Promisify an event by waiting for it to be emitted

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

Tiny and elegant HTTP client based on the Fetch API

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

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

JavaScript SVG parser and renderer on Canvas.

Lazy assertions without performance penalty

Get a KeyboardEvent.key-style string from an event

Microsoft Azure Storage SDK for JavaScript - Blob

Cross-browser `CustomEvent` constructor

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

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 a natural number

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.

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

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

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

Topological sort of directed acyclic graphs (like dependecy lists)

Plugin for loglevel message prefixing

LRU and FIFO caches for Client or Server

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

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

Serializes any DOM node into a String

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

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.

Dynamic script loading for browser

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

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

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

HKDF with no dependencies using runtime's native crypto

browser-side require() the node way

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

A tool to get browser's scrollbars width.

Isomorphic WebSocket

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

DOMParser.parseFromString for XML with IE8 fallback

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

Tests if ES6 @@toStringTag is supported.

Isomorphic client library for Azure KeyVault's keys.

Tests if ES6 Symbol is supported.

Get the paths of edge browser easily

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

Extends Chai with assertions about promises.

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

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

Simple JS stack with auto run for node and browsers

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

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

Browser compatibility data provided by MDN Web Docs

sort module-deps output for deterministic browserify bundles

Array#filter for older browsers.

Detect device type and render your component according to it

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

Unpack a browser type and version from the useragent string

File manager plugin for CKEditor 5

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

Create a MD5 hash with hex encoding

Analyze and debug space usage through source maps

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

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

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

XMLHttpRequest emulation for node.js

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

Mouse wheel normalization across multiple multiple browsers.

provides locking mechanism to sync across browser tabs

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

Cross Platform implementation of the GitLab API

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

OpenTelemetry instrumentation for fetch http client in web browsers

Node standard library for browser.

Isomorphic client library for Azure KeyVault's secrets.

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

A client for working with the BrowserStack APIs.

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

Check if mobile browser.

Logger Utils

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

tap-producing test harness for node and browsers

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!

Minimal JavaScript module loader

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Simple JS queue with auto run for node and browsers

Lint browser compatibility of API used

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

Browser fingerprinting library with the highest accuracy and stability

A Minimalistic Wrapper for IndexedDB

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

Javascript audio library for the modern web.

Browser port of the Node.js 'request' package

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

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

Tiny local JSON database for Node, Electron and the browser

A generated SDK for WebSiteManagementClient.

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

The official Fullstory browser SDK

Environment utilities

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

Simple JS queue with auto run for node and browsers

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

Test whether value is error object

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

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

Lightweight copy to clipboard for the web

Compress images in the browser

Google's libphonenumber pre-compiled with the closure compiler

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

A generated SDK for ResourceManagementClient.

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

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

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

strings comparison matchers for chai

Normalize browsers' default style

watch mode for browserify builds

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

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

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.

Faro instrumentations, metas, transports for web.

Populate a <canvas> element with a font texture atlas

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)

Chromium Binary for Serverless Platforms

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

AWS X-Ray ID generator for OpenTelemetry

Auto mock all localstorage and sessionstorage APIs for your Jest tests

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

insert a string of css into the <head>

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

<!-- markdownlint-disable MD024 -->

Check if browser is Internet Explorer

small function to append a query string to a URL

Extend Chai Assertion library with tests for http apis

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

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

UI utilities

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

tiny http client for Node and the browser

Microsoft Azure Storage SDK for JavaScript - Queue

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

Base draggable class

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

Browser running for Vitest using playwright

A companion library to openai for Azure OpenAI.

Cascading grid layout library

Javascript string formatter for human readability

Advanced HTTP requests in node.js and browsers

Check if a value is a `Blob`

Faro web tracing implementation.

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

Check if browser is Firefox

Consistent cross browser mouse wheel movement

Get the size of an element in pixels, including margins

JS Library & ExpressJS user-agent middleware exposing

browserify compatible version of the ace editor.

Fingerprint JavaScript agent

A dynamic, browser-based visualization library.

Render React components in Vitest Browser Mode

AngularJS mocks for testing

Chai plugin for JSON Schema v4

Fast client-side asset builder

launch a web worker that can require() in the browser with browserify

get webrtc browser methods unprefixed

Use Ky in both Node.js and browsers

Auth0 headless browser sdk

JavaScript barcode generator supporting over 100 types and standards.

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

A generated SDK for ContainerInstanceManagementClient.

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

Vendor agnostic access to the fullscreen spec api

Mouse wheel normalization across multiple multiple browsers.

Utility library to determine and normalize Element.scrollLeft behavior

JavaScript API to work against complex domain names, subdomains and URIs.

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.

Emscripten distribution of libheif for Node.JS and the browser

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

Copy to clipboard.

A regular expression that matches a CHANGELOG filename

Event based JavaScript for the browser

memlab API

An extremely fast, React-like JavaScript library for building modern user interfaces

Returns the `window` object from a DOM object

A generated SDK for StorageManagementClient.