JSPM

The string_decoder module from Node core

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

Node.js Buffer API, for the browser

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

Array#isArray for older browsers

ES2015 `Object.assign()` ponyfill

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

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

Determine if an object is a Buffer

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

Public API for OpenTelemetry

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

Base class for node which OpenTelemetry instrumentation modules extend

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

Universal WHATWG Fetch API for Node, Browsers and React Native

Public logs API for OpenTelemetry

JavaScript's functional programming helper library.

Lightweight browser detector

Microsoft Azure SDK for JavaScript - Aborter

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

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

A simple, lightweight JavaScript API for handling cookies

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

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

High performance (de)compression in an 8kB package

the stream module from node core for browsers

the path module from node core for browsers

HTML5 `FormData` for Browsers and Node.

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

Get the default browser

Convert a typed array to a Buffer without a copy

JavaScript library for DOM operations

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

Random number generator for browsers and node.js

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

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 👨‍💻.

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

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

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

https module compatability for browserify

Microsoft Azure SDK for JavaScript - Logger

Decode JWT tokens, mostly useful for browser applications.

JSON without touching any globals

Parse milliseconds into an object

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

Isomorphic implementation of WebSocket

the tty module from node core for browsers

vm module for the browser

node's constants module for the browser

timers module for browserify

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

A polyfill for the Resize Observer API

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

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

resolve which handles browser field support in package.json

Lazy assertions without performance penalty

Toggle current selected content in browser

Promisify an event by waiting for it to be emitted

Copy stuff into clipboard using JS with fallbacks

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

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.

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

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

JavaScript SVG parser and renderer on Canvas.

Microsoft Azure Storage SDK for JavaScript - Blob

Check if a value is a natural number

Cross-browser `CustomEvent` constructor

Tiny and elegant HTTP client based on the Fetch API

Get a KeyboardEvent.key-style string from an event

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.

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

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

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

Dynamic script loading for browser

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

Isomorphic WebSocket

browser-side require() the node way

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

Plugin for loglevel message prefixing

Topological sort of directed acyclic graphs (like dependecy lists)

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

DOMParser.parseFromString for XML with IE8 fallback

LRU and FIFO caches for Client or Server

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

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

Serializes any DOM node into a String

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

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

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

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

HKDF with no dependencies using runtime's native crypto

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

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

A tool to get browser's scrollbars width.

Simple JS stack with auto run for node and browsers

sort module-deps output for deterministic browserify bundles

Tests if ES6 Symbol is supported.

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

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

Tests if ES6 @@toStringTag is supported.

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

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

A generated SDK for WebSiteManagementClient.

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

Isomorphic client library for Azure KeyVault's keys.

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

Extends Chai with assertions about promises.

Get the paths of edge browser easily

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

Detect device type and render your component according to it

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

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

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

Browser compatibility data provided by MDN Web Docs

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

tap-producing test harness for node and browsers

Analyze and debug space usage through source maps

Array#filter for older 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!

XMLHttpRequest emulation for node.js

Unpack a browser type and version from the useragent string

OpenTelemetry instrumentation for fetch http client in web browsers

Create a MD5 hash with hex encoding

Check if mobile browser.

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

File manager plugin for CKEditor 5

Node standard library for browser.

Simple JS queue with auto run for node and browsers

Mouse wheel normalization across multiple multiple browsers.

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

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.

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

Cross Platform implementation of the GitLab API

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

A generated SDK for ResourceManagementClient.

A Minimalistic Wrapper for IndexedDB

Isomorphic client library for Azure KeyVault's secrets.

Lint browser compatibility of API used

Tiny local JSON database for Node, Electron and the browser

Minimal JavaScript module loader

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

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

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

Browser fingerprinting library with the highest accuracy and stability

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

The official Fullstory browser SDK

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

Simple JS queue with auto run for node and browsers

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

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

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

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

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.

Browser port of the Node.js 'request' package

Javascript audio library for the modern web.

Environment utilities

Test whether value is error object

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

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

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

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

Logger Utils

Google's libphonenumber pre-compiled with the closure compiler

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

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

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

Lightweight copy to clipboard for the web

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

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

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

watch mode for browserify builds

strings comparison matchers for chai

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

Compress images in 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

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.

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

UI utilities

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)

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

Microsoft Azure Storage SDK for JavaScript - Queue

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

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

Normalize browsers' default style

AWS X-Ray ID generator for OpenTelemetry

Lint CSS for browser support against caniuse database

A pure JavaScript client for the tus resumable upload protocol

Auto mock all localstorage and sessionstorage APIs for your Jest tests

provides locking mechanism to sync across browser tabs

Check if browser is Internet Explorer

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

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

Chromium Binary for Serverless Platforms

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

Populate a <canvas> element with a font texture atlas

Faro instrumentations, metas, transports for web.

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

<!-- markdownlint-disable MD024 -->

Extend Chai Assertion library with tests for http apis

A companion library to openai for Azure OpenAI.

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

Chai plugin for JSON Schema v4

JavaScript barcode generator supporting over 100 types and standards.

small function to append a query string to a URL

Cascading grid layout library

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

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

Auth0 headless browser sdk

Javascript string formatter for human readability

browserify compatible version of the ace editor.

Consistent cross browser mouse wheel movement

Check if a value is a `Blob`

tiny http client for Node and the browser

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

ExpressJS/Connect/TrinteJS user-agent middleware exposing

Faro web tracing implementation.

Get the size of an element in pixels, including margins

Check if browser is Firefox

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

Generic browser priority queue.

memlab browser E2E interaction libraries

Use Ky in both Node.js and browsers

Advanced HTTP requests in node.js and browsers

compute the bounding box of geojson features

Emscripten distribution of libheif for Node.JS and the browser

Mouse wheel normalization across multiple multiple browsers.

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

Fast client-side asset builder

Capture browser logs for logging in NodeJS

insert a string of css into the <head>

A generated SDK for ContainerInstanceManagementClient.

Automated browser testing for the modern web development stack.

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

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

memlab API

get webrtc browser methods unprefixed

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

AngularJS mocks for testing

Simple utility for watching and retrieving browser viewport width, height, vmin and vmax

Base draggable class

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

Vendor agnostic access to the fullscreen spec api

A regular expression that matches a CHANGELOG filename

Migrate older jQuery code to jQuery 3.0+