JSPM

Universal WHATWG Fetch API for Node, Browsers and React Native

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

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.

Microsoft Azure SDK for JavaScript - Aborter

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

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

High performance (de)compression in an 8kB package

the stream module from node core for browsers

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

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

Get the default browser

JavaScript library for DOM operations

Parse and stringify URL query strings

A simple, lightweight JavaScript API for handling cookies

HTML5 `FormData` for Browsers and Node.

JavaScript's functional programming helper library.

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

Random number generator for browsers and node.js

timers module for browserify

node's constants module for the browser

Parse milliseconds into an object

Isomorphic implementation of WebSocket

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

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

Decode JWT tokens, mostly useful for browser applications.

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

Toggle current selected content in browser

https module compatability for browserify

A polyfill for the Resize Observer API

JSON without touching any globals

Copy stuff into clipboard using JS with fallbacks

Microsoft Azure SDK for JavaScript - Logger

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

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

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

Promisify an event by waiting for it to be emitted

Get a KeyboardEvent.key-style string from an event

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

Lazy assertions without performance penalty

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

Node SDK for Scrapeless AI

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.

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

Tiny and elegant HTTP client based on the Fetch API

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

JavaScript SVG parser and renderer on Canvas.

Cross-browser `CustomEvent` constructor

LRU and FIFO caches for Client or Server

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

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

Serializes any DOM node into a String

botd is a browser library for JavaScript bot detection

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.

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

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

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

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

A tool to get browser's scrollbars width.

Plugin for loglevel message prefixing

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

Tests if ES6 @@toStringTag is supported.

Isomorphic client library for Azure KeyVault's keys.

Extends Chai with assertions about promises.

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

Tests if ES6 Symbol is supported.

Topological sort of directed acyclic graphs (like dependecy lists)

Dynamic script loading for browser

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

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

Unpack a browser type and version from the useragent string

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

browser-side require() the node way

Array#filter for older browsers.

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

XMLHttpRequest emulation for node.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

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

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

DOMParser.parseFromString for XML with IE8 fallback

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

Get the paths of edge browser easily

Browser compatibility data provided by MDN Web Docs

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

Simple JS stack with auto run for node and browsers

Node standard library for browser.

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

Detect device type and render your component according to it

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

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.

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

sort module-deps output for deterministic browserify bundles

Minimal JavaScript module loader

Analyze and debug space usage through source maps

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

Create a MD5 hash with hex encoding

File manager plugin for CKEditor 5

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

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

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

Browser port of the Node.js 'request' package

Mouse wheel normalization across multiple multiple browsers.

Tiny local JSON database for Node, Electron and the browser

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

Cross Platform implementation of the GitLab API

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

A client for working with the BrowserStack APIs.

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

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

OpenTelemetry instrumentation for fetch http client in web browsers

Isomorphic client library for Azure KeyVault's secrets.

Test whether value is error object

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

Logger Utils

Check if mobile browser.

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

tap-producing test harness for node and browsers

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Lint browser compatibility of API used

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

Simple JS queue with auto run 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

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

Browser fingerprinting library with the highest accuracy and stability

provides locking mechanism to sync across browser tabs

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

A Minimalistic Wrapper for IndexedDB

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

strings comparison matchers for chai

watch mode for browserify builds

Javascript audio library for the modern web.

Daily updated browser device profiles

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

A generated SDK for WebSiteManagementClient.

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

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)

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

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)

Compress images in the browser

Google's libphonenumber pre-compiled with the closure compiler

Lightweight copy to clipboard for the web

small function to append a query string to a URL

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

Extend Chai Assertion library with tests for http apis

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

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

Lint CSS for browser support against caniuse database

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

Simple JS queue with auto run for node and browsers

tiny http client for Node and the browser

An AI web browsing framework focused on simplicity and extensibility.

Browser running for Vitest using playwright

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

Get the size of an element in pixels, including margins

Check if browser is Firefox

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.

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

Chromium Binary for Serverless Platforms

Auto mock all localstorage and sessionstorage APIs for your Jest tests

AWS X-Ray ID generator for OpenTelemetry

Check if a value is a `Blob`

Normalize browsers' default style

A dynamic, browser-based visualization library.

Consistent cross browser mouse wheel movement

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

Check if browser is Internet Explorer

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

Render React components in Vitest Browser Mode

UI utilities

Mouse wheel normalization across multiple multiple browsers.

browserify compatible version of the ace editor.

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

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.

Faro instrumentations, metas, transports for web.

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

Populate a <canvas> element with a font texture atlas

A regular expression that matches a CHANGELOG filename

Microsoft Azure Storage SDK for JavaScript - Queue

Copy to clipboard.

A companion library to openai for Azure OpenAI.

<!-- markdownlint-disable MD024 -->

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

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

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

Javascript string formatter for human readability

insert a string of css into the <head>

Faro web tracing implementation.

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

React hooks done right, for browser and SSR.

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

JS Library & ExpressJS user-agent middleware exposing

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

Returns a copy of an object, sorted deeply by its keys, without mangling any arrays inside of it

Chai plugin for JSON Schema v4

Fast client-side asset builder

Base draggable class

Fingerprint JavaScript agent

Use Ky in both Node.js and browsers

return all coordinates from a geojson object

Auth0 headless browser sdk

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

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

get webrtc browser methods unprefixed

JavaScript barcode generator supporting over 100 types and standards.

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

A generated SDK for SubscriptionClient.

Vendor agnostic access to the fullscreen spec api

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

Emscripten distribution of libheif for Node.JS and the browser

Automated browser testing for the modern web development stack.

memlab API

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

Cascading grid layout library

Advanced HTTP requests in node.js and browsers

A browserify optimized module of google maps infobox

http module compatability for browserify

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

Provides an enum of all possible VNode Flags used when calling Inferno.createVNode

Event based JavaScript for the browser

a geographic extent object

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

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

Node.js Buffer API, for the browser

Join all elements of an array and create a human-readable string

compute the bounding box of geojson features

A generated SDK for StorageManagementClient.