JSPM

Build Chrome Extensions with this Vite plugin.

Easily publish web extensions to their stores

Utility functions for Web Extensions, manifest v2 and v3

A list of MathJax extensions provided by third-party contributors

High-level events and utilities for events in Web Extensions

A more usable typed storage API for Web Extensions

Create cross-browser extensions with no build configuration.

DOM extensions

Build Chrome Extensions with this Rollup plugin.

WEBGI GLTF Extensions for glTF-Transform and three.js

alert() for background pages/workers in Web Extensions

AngularJS module for plural and gender MessageFormat extensions $interpolate/interpolations

Extremely minimal stylesheet/setup for Web Extensions’ options pages (also dark mode)

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

A lightweight Redux enhancer for syncing state across different environments, including browser extensions and Electron applications

A dead simple routing solution for browser extensions using React

Basic but commonly used extensions

The JavaScript library for https://extensionpay.com - payments for browser extensions, no server needed.

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

Additional to @yamato-daiwa/es-extensions functionality for browser environment. Helper functions and classes aimed to reduce the routine code. Build-in TypeScript type safety.

Provides prototype extensions for native JS modules

Babel preset used for creating browser extensions. Supports React and TypeScript.

webpack plugin to handle json assets from browser extensions

webpack plugin to handle locale assets from browser extensions

webpack plugin to handle manifest icon assets from browser extensions

webpack plugin to handle manifest web resources assets from browser extensions

webpack plugin to handle browser extensions incompatibilities

webpack plugin to handle browser extensions manifest file

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

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

webpack plugin to handle common errors from browser extensions

webpack plugin to handle HTML assets from browser extensions

webpack plugin to develop cross-browser extensions and Mozilla Add-Ons.

A generated SDK for ExtensionsClient.

Service Worker workflow execution engine - Run complex data transformations in Chrome service workers and browser extensions

webpack plugin to handle manifest script assets (background, content scripts, content css, service worker) from browser extensions

Model Context Protocol server for browser automation. Enables AI applications to control browsers through Chrome/Firefox extensions.

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

Companion package to 'Extension Development - Auto Reloader' chrome extension, to automatically reload target browser extensions during the extension development process.

XMLHttpRequest emulation for node.js

tRPC adapters and links for everywhere in the browser

Node standard library for browser.

Minimal JavaScript module loader

Create cross-browser extensions with no build configuration.

⚡ Next-gen Web Extension Framework

underscorex are some basic extensions for underscore.js

tRPC adapter for Web Extensions

The string_decoder module from Node core

Array#isArray for older browsers

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.

Determine if an object is a Buffer

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

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

Strophe.js is an XMPP library for JavaScript

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

Public API for OpenTelemetry

Watch for changes and force the reload of the browser extension

the path module from node core for browsers

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

Universal WHATWG Fetch API for Node, Browsers and React Native

Lightweight browser detector

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

Microsoft Azure SDK for JavaScript - Aborter

Convert a typed array to a Buffer without a copy

High performance (de)compression in an 8kB package

JavaScript's functional programming helper library.

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

JavaScript library for DOM operations

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

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

Effortless State Synchronization for Web Extensions

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

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

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

A simple, lightweight JavaScript API for handling cookies

Get the default browser

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

HTML5 `FormData` for Browsers and Node.

Decode JWT tokens, mostly useful for browser applications.

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

Parse milliseconds into an object

Random number generator for browsers and node.js

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

https module compatability for browserify

Isomorphic implementation of WebSocket

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

node's constants module for the browser

JSON without touching any globals

the tty module from node core for browsers

timers module for browserify

vm module for the browser

a browserify server for rapid prototyping

A polyfill for the Resize Observer API

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

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

Lazy assertions without performance penalty

Toggle current selected content in browser

Copy stuff into clipboard using JS with fallbacks

Microsoft Azure SDK for JavaScript - Logger

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

Promisify an event by waiting for it to be emitted

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

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

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

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.

resolve which handles browser field support in package.json

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

Get a KeyboardEvent.key-style string from an event

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

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

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

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

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

JavaScript SVG parser and renderer on Canvas.

Messaging Library for Web Extensions

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

LRU and FIFO caches for Client or Server

Isomorphic WebSocket

Serializes any DOM node into a String

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

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.

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

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

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

Topological sort of directed acyclic graphs (like dependecy lists)

Easily publish web extensions to their stores

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

HKDF with no dependencies using runtime's native crypto

Plugin for loglevel message prefixing

A tool to get browser's scrollbars width.

Dynamic script loading for browser

Tests if ES6 Symbol is supported.

Tests if ES6 @@toStringTag is supported.

browser-side require() the node way

Isomorphic client library for Azure KeyVault's keys.

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

DOMParser.parseFromString for XML with IE8 fallback

Extends Chai with assertions about promises.

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

Simple JS stack with auto run for node and browsers

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

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

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

Generate icons for mobile apps and broswer extensions/plugins.

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!

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

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

Unpack a browser type and version from the useragent string

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

sort module-deps output for deterministic browserify bundles

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

Array#filter for older browsers.

A generated SDK for WebSiteManagementClient.

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

Browser compatibility data provided by MDN Web Docs

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

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

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

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

A generated SDK for ResourceManagementClient.

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

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

Tiny local JSON database for Node, Electron and the browser

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

Simple JS queue with auto run for node and browsers

Create a MD5 hash with hex encoding

A client for working with the BrowserStack APIs.

Mouse wheel normalization across multiple multiple browsers.

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

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

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

tap-producing test harness for node and browsers

Cross Platform implementation of the GitLab API

Browser port of the Node.js 'request' package

OpenTelemetry instrumentation for fetch http client in web browsers

Check if mobile browser.

A logging library for browsers and nodejs environment

Test whether value is error object

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

File manager plugin for CKEditor 5

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

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

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

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

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

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

Universal VDA 5050 library for Node.js and browsers

A Minimalistic Wrapper for IndexedDB

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

Simple JS queue with auto run for node and browsers

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

Isomorphic client library for Azure KeyVault's secrets.

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.

Lint browser compatibility of API used

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

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

watch mode for browserify builds

strings comparison matchers for chai

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

Javascript audio library for the modern web.

Browser fingerprinting library with the highest accuracy and stability

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

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

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

The official Fullstory browser SDK

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

Google's libphonenumber pre-compiled with the closure compiler

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

Logger Utils

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

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)

Environment utilities

Lightweight copy to clipboard for the web

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

Compress images in the browser

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

A pure JavaScript client for the tus resumable upload protocol

Lint CSS for browser support against caniuse database

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

Normalize browsers' default style

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

provides locking mechanism to sync across browser tabs

Extend Chai Assertion library with tests for http apis

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

Auto mock all localstorage and sessionstorage APIs for your Jest tests

small function to append a query string to a URL

Microsoft Azure Storage SDK for JavaScript - Queue