JSPM

Node standard library for browser.

tRPC adapters and links for everywhere in the browser

Minimal JavaScript module loader

⚡ Next-gen Web Extension Framework

The string_decoder module from Node core

tRPC adapter for Web Extensions

underscorex are some basic extensions for underscore.js

Array#isArray for older browsers

Create cross-browser extensions with no build configuration.

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

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

Node.js Buffer API, for the browser

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

ES2015 `Object.assign()` ponyfill

Utilities for working with match patterns.

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

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

Strophe.js is an XMPP library for JavaScript

Determine if an object is a Buffer

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

Public API for OpenTelemetry

A markdown parser library that renders to svelte components.

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

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

Public logs API for OpenTelemetry

Base class for node which OpenTelemetry instrumentation modules extend

A vite plugin for generating cross browser platform, ES module based web extensions

Watch for changes and force the reload of the browser extension

JavaScript's functional programming helper library.

Universal WHATWG Fetch API for Node, Browsers and React Native

the path module from node core for browsers

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

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

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

Effortless State Synchronization for Web Extensions

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

Provides a Tailwind CSS configuration with RXAP-specific theme extensions, including custom color palettes and font families. It also includes an init generator that adds missing peer dependencies to the project's package.json and runs init generators for

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

a browserify server for rapid prototyping

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.

Tool to convert the patterns and globs of your WebExtension manifest to regex

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

The library for programming secure service workers for web applications, browser extensions, and the edge (i.e. Cloudflare Workers)

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

detect file extensions, check if text or binary file, or get list of text or binary file extensions

Messaging Library for Web Extensions

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

HKDF with no dependencies using runtime's native crypto

A tool to get browser's scrollbars width.

Plugin for loglevel message prefixing

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

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

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

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

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

A logging library for browsers and nodejs environment

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

A vite plugin for generating cross browser platform, ES module based web extensions

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

Test whether value is error object

Easily publish web extensions to their stores

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.

Build Chrome Extensions with this Rollup plugin.

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

Universal VDA 5050 library for Node.js and browsers

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.

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

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

The official Fullstory browser SDK

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

Build Chrome Extensions with this Rollup plugin.

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

Watch for file changes and reload WebExtensions on browsers.

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

browserify compatible version of the ace editor.

<!-- markdownlint-disable MD024 -->

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.

Emscripten distribution of libheif for Node.JS and the browser