JSPM

The string_decoder module from Node core

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

Array#isArray for older browsers

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

Node.js Buffer API, for the browser

Promise based HTTP client for the browser and node.js

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

ES2015 `Object.assign()` ponyfill

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

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

Determine if an object is a Buffer

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

Base class for node which OpenTelemetry instrumentation modules extend

Public API for OpenTelemetry

Universal WHATWG Fetch API for Node, Browsers and React Native

Lightweight browser detector

Public logs API for OpenTelemetry

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

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

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

Get the default browser

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

the path module from node core for browsers

JavaScript's functional programming helper library.

A simple, lightweight JavaScript API for handling cookies

HTML5 `FormData` for Browsers and Node.

Microsoft Azure SDK for JavaScript - Aborter

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

the stream module from node core for browsers

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

Random number generator for browsers and node.js

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

High-performance, configurable, batch-generating User-Agent spoofing library. Supports multiple browsers, devices, and returns detailed meta information. Perfect for web scraping, automated testing, proxy pools and more.

High performance (de)compression in an 8kB package

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

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

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.

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

Microsoft Azure SDK for JavaScript - Logger

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

Parse milliseconds into an object

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

Isomorphic implementation of WebSocket

Decode JWT tokens, mostly useful for browser applications.

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

the tty module from node core for browsers

vm module for the browser

A polyfill for the Resize Observer API

https module compatability for browserify

Node SDK for Scrapeless AI

JSON without touching any globals

Toggle current selected content in browser

Copy stuff into clipboard using JS with fallbacks

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

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

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

JavaScript SVG parser and renderer on Canvas.

Lazy assertions without performance penalty

Get a KeyboardEvent.key-style string from an event

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

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

Tiny and elegant HTTP client based on the Fetch API

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

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

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.

Cross-browser `CustomEvent` constructor

Microsoft Azure Storage SDK for JavaScript - Blob

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

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

Check if a value is a natural number

botd is a browser library for JavaScript bot detection

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

LRU and FIFO caches for Client or Server

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

Plugin for loglevel message prefixing

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

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

Serializes any DOM node into a String

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

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

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

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

browser-side require() the node way

HKDF with no dependencies using runtime's native crypto

A tool to get browser's scrollbars width.

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

Isomorphic WebSocket

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

DOMParser.parseFromString for XML with IE8 fallback

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

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

Topological sort of directed acyclic graphs (like dependecy lists)

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

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)

sort module-deps output for deterministic browserify bundles

Array#filter for older browsers.

Detect device type and render your component according to it

File manager plugin for CKEditor 5

Unpack a browser type and version from the useragent string

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

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

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

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

Create a MD5 hash with hex encoding

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

Simple JS stack with auto run for node and browsers

Browser compatibility data provided by MDN Web Docs

OpenTelemetry instrumentation for fetch http client in web browsers

Node standard library for browser.

Isomorphic client library for Azure KeyVault's secrets.

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

Analyze and debug space usage through source maps

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

Check if mobile browser.

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.

tap-producing test harness for node and browsers

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

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

Logger Utils

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Mouse wheel normalization across multiple multiple browsers.

Lint browser compatibility of API used

Simple JS queue with auto run for node and browsers

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

Cross Platform implementation of the GitLab API

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

A client for working with the BrowserStack APIs.

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

Tiny local JSON database for Node, Electron and the browser

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

Javascript audio library for the modern web.

A generated SDK for WebSiteManagementClient.

The official Fullstory browser SDK

Environment utilities

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

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

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

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

Daily updated browser device profiles

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

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

A generated SDK for ResourceManagementClient.

provides locking mechanism to sync across browser tabs

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.

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

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

watch mode for browserify builds

Lightweight copy to clipboard for the 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

Compress images in the browser

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

Google's libphonenumber pre-compiled with the closure compiler

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.

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)

AWS X-Ray ID generator for OpenTelemetry

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

Auto mock all localstorage and sessionstorage APIs for your Jest tests

Lint CSS for browser support against caniuse database

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

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

Check if browser is Internet Explorer

Extend Chai Assertion library with tests for http apis

small function to append a query string to a URL

Simple JS queue with auto run for node and browsers

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

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

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

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

UI utilities

An AI web browsing framework focused on simplicity and extensibility.

tiny http client for Node and the browser

Microsoft Azure Storage SDK for JavaScript - Queue

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.

A pure JavaScript client for the tus resumable upload protocol

Browser running for Vitest using playwright

A companion library to openai for Azure OpenAI.

Javascript string formatter for human readability

Check if a value is a `Blob`

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

Check if browser is Firefox

Normalize browsers' default style

Get the size of an element in pixels, including margins

Consistent cross browser mouse wheel movement

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

browserify compatible version of the ace editor.

Chai plugin for JSON Schema v4

A dynamic, browser-based visualization library.

Render React components in Vitest Browser Mode

Use Ky in both Node.js and browsers

Fingerprint JavaScript agent

JavaScript barcode generator supporting over 100 types and standards.

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

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

Faro instrumentations, metas, transports for web.

Populate a <canvas> element with a font texture atlas

Auth0 headless browser sdk

Utility library to determine and normalize Element.scrollLeft behavior

Mouse wheel normalization across multiple multiple browsers.

Vendor agnostic access to the fullscreen spec api

Emscripten distribution of libheif for Node.JS and the browser

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.

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

Faro web tracing implementation.

Copy to clipboard.

A regular expression that matches a CHANGELOG filename

JS Library & ExpressJS user-agent middleware exposing

insert a string of css into the <head>

<!-- markdownlint-disable MD024 -->

Fast client-side asset builder

get webrtc browser methods unprefixed

memlab browser E2E interaction libraries

Read `*.xlsx` files of moderate size in a web browser or on a server.

OpenFeature SDK for Web

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

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

compute the bounding box of geojson features

A generated SDK for StorageManagementClient.

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