JSPM

Convert a typed array to a Buffer without a copy

Microsoft Azure SDK for JavaScript - Aborter

Lightweight browser detector

High performance (de)compression in an 8kB package

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

JavaScript library for DOM operations

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

the stream module from node core for browsers

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

Parse and stringify URL query strings

A simple, lightweight JavaScript API for handling cookies

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

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

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

Get the default browser

HTML5 `FormData` for Browsers and Node.

Random number generator for browsers and node.js

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

Decode JWT tokens, mostly useful for browser applications.

https module compatability for browserify

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

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

Parse milliseconds into an object

JSON without touching any globals

Isomorphic implementation of WebSocket

timers module for browserify

the tty module from node core for browsers

vm module for the browser

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

node's constants module for the browser

A polyfill for the Resize Observer API

Lazy assertions without performance penalty

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

Toggle current selected content in browser

Microsoft Azure SDK for JavaScript - Logger

resolve which handles browser field support in package.json

Promisify an event by waiting for it to be emitted

Copy stuff into clipboard using JS with fallbacks

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

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

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

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

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

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

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

Get a KeyboardEvent.key-style string from an event

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

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

Microsoft Azure Storage SDK for JavaScript - Blob

Cross-browser `CustomEvent` constructor

Check if a value is a natural number

Tiny and elegant HTTP client based on the Fetch API

(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.

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

JavaScript SVG parser and renderer on Canvas.

Isomorphic WebSocket

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

LRU and FIFO caches for Client or Server

Dynamic script loading for browser

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

🔥 An extremely fast and efficient LRU cache for JavaScript with high compatibility (including Browsers) — 6.8KB.

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

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

Serializes any DOM node into a String

Topological sort of directed acyclic graphs (like dependecy lists)

browser-side require() the node way

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

DOMParser.parseFromString for XML with IE8 fallback

A tool to get browser's scrollbars width.

HKDF with no dependencies using runtime's native crypto

Plugin for loglevel message prefixing

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

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

Tests if ES6 @@toStringTag is supported.

Tests if ES6 Symbol is supported.

Isomorphic client library for Azure KeyVault's keys.

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

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

Extends Chai with assertions about promises.

sort module-deps output for deterministic browserify bundles

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

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

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

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

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

A generated SDK for WebSiteManagementClient.

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

Array#filter for older browsers.

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

XMLHttpRequest emulation for node.js

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

Simple JS stack with auto run for node and browsers

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

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

Unpack a browser type and version from the useragent string

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

Browser compatibility data provided by MDN Web Docs

Node standard library for 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!

tap-producing test harness for node and browsers

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

Get the paths of edge browser easily

Detect device type and render your component according to it

Analyze and debug space usage through source maps

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

OpenTelemetry instrumentation for fetch http client in web browsers

A generated SDK for ResourceManagementClient.

Check if mobile browser.

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Create a MD5 hash with hex encoding

Minimal JavaScript module loader

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

A client for working with the BrowserStack APIs.

File manager plugin for CKEditor 5

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

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

Cross Platform implementation of the GitLab API

Tiny local JSON database for Node, Electron and the browser

Mouse wheel normalization across multiple multiple browsers.

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

A Minimalistic Wrapper for IndexedDB

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

Browser port of the Node.js 'request' package

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

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

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

Test whether value is error object

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

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

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

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

Promptbook: Run AI apps in plain human language across multiple models and platforms

Lint browser compatibility of API used

Isomorphic client library for Azure KeyVault's secrets.

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

Simple JS queue with auto run for node and browsers

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

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.

Simple JS queue with auto run for node and browsers

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

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

Browser fingerprinting library with the highest accuracy and stability

watch mode for browserify builds

The official Fullstory browser SDK

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

Javascript audio library for the modern web.

strings comparison matchers for chai

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

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

Google's libphonenumber pre-compiled with the closure compiler

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

Lightweight copy to clipboard for the web

Logger Utils

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

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)

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

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

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

Compress images in the browser

A pure JavaScript client for the tus resumable upload protocol

Lint CSS for browser support against caniuse database

Normalize browsers' default style

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

Microsoft Azure Storage SDK for JavaScript - Queue

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

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

provides locking mechanism to sync across browser tabs

AWS X-Ray ID generator for OpenTelemetry

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.

Auto mock all localstorage and sessionstorage APIs for your Jest tests

Chromium Binary for Serverless Platforms

UI utilities

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

Populate a <canvas> element with a font texture atlas

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

Extend Chai Assertion library with tests for http apis

small function to append a query string to a URL

<!-- markdownlint-disable MD024 -->

browserify compatible version of the ace editor.

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

Check if a value is a `Blob`

Consistent cross browser mouse wheel movement

Get the size of an element in pixels, including margins

Check if browser is Firefox

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

Check if browser is Internet Explorer

tiny http client for Node and the browser

Chai plugin for JSON Schema v4

Cascading grid layout library

JavaScript barcode generator supporting over 100 types and standards.

Read small to medium `*.xlsx` files in a browser or Node.js. Parse to JSON with a strict schema.

Mouse wheel normalization across multiple multiple browsers.

Advanced HTTP requests in node.js and browsers

Automated browser testing for the modern web development stack.

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

A companion library to openai for Azure OpenAI.

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

ExpressJS/Connect/TrinteJS user-agent middleware exposing

Faro web tracing implementation.

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

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

memlab browser E2E interaction libraries

insert a string of css into the <head>

Generic browser priority queue.

A generated SDK for ContainerInstanceManagementClient.

Emscripten distribution of libheif for Node.JS and the browser

A regular expression that matches a CHANGELOG filename

Auth0 headless browser sdk

Give eachr an item to iterate (array, object or map) and an iterator, then in return eachr gives iterator the value and key of each item, and will stop if the iterator returned false.

Cross browser String#split implementation

Capture browser logs for logging in NodeJS

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

Fast client-side asset builder

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

Javascript string formatter for human readability

Render React components in Vitest Browser Mode

Base draggable class

Copy to clipboard.

React hooks done right, for browser and SSR.

return all coordinates from a geojson object

Returns `true` if the Selection is "backward", `false` otherwise

memlab API

Use Ky in both Node.js and browsers

compute the bounding box of geojson features

AngularJS mocks for testing

Utility library to determine and normalize Element.scrollLeft behavior

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

get webrtc browser methods unprefixed

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.

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

A generated SDK for ComputeManagementClient.

Migrate older jQuery code to jQuery 3.0+

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

a geographic extent object

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

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

Returns the `window` object from a DOM object

Fingerprint Pro JavaScript agent

A generated SDK for NetworkManagementClient.

Event based JavaScript for the browser

A dynamic, browser-based visualization library.

Easy to use Node.js based end-to-end testing solution for web applications using the W3C WebDriver API.

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

OpenFeature SDK for Web

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