JSPM

Tiny local JSON database for Node, Electron and the browser

Lint CSS for browser support against caniuse database

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

Addon to Dexie that makes it possible to observe database changes no matter if they occur on other db instance or other window.

A NoSQL document store database for browsers and Node.js.

an eventually consistent database

Tiny local JSON database for Node, Electron and the browser

Tiny local JSON database for Node, Electron and the browser

AceBase realtime database. Open source firebase alternative for nodejs and browser, with additional features: indexes, geo, fulltext, queries, custom storage, offline usage, synchronization, live data proxies and more

⚡ The fastest and most lightweight open-source VIN decoding library. Fully offline, TypeScript-first, with comprehensive NHTSA VPIC database integration for Node.js, browsers, and Cloudflare Workers.

A Minimalistic Wrapper for IndexedDB

Client to connect to an AceBase realtime database server

Quadstore is a LevelDB-backed RDF graph database / triplestore for JavaScript runtimes (browsers, Node.js, Deno, Bun, ...) that implements the RDF/JS interfaces and supports SPARQL queries and querying across named graphs.

Lite&easy database for browsers based on localStorage.

Community plugin for native & electron SQLite databases

A type of distributed database built on top of the distributed browser-network

Proxified asynchronous API for distributed IndexedDB. Create local or distributed database in the browser for multiplayer games, collaborative software or for the fun of it!

Simple client side storage solution written in TypeScript.

A generated SDK for SqlManagementClient.

Fast & effecient user agent string parser. Uses uap-core (Browserscope) data for parsing. Drop-in replacement for useragent

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

A generic connection string parser/formatter

Tiny local JSON database for Node, Electron and the browser

The string_decoder module from Node core

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

Array#isArray for older browsers

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.

Create polls and manage votes with a MongoDB or MySQL database.

ES2015 `Object.assign()` ponyfill

Like Lego For Databases

A javascript port of Matomo device-detector

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

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

A generated SDK for CosmosDBManagementClient.

A lightweight and efficient vector database for storing and searching text embeddings in the browser's local storage. The package uses OpenAI's API to generate embeddings for text documents and provides functionality for similarity search, filtering, and

Determine if an object is a Buffer

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

SQLocal makes it easy to run SQLite3 in the browser, backed by the origin private file system.

Public API for OpenTelemetry

A NoSQL document store database for browsers and Node.js.

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

Lint CSS for browser support against caniuse database

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

Lightweight browser detector

Microsoft Azure SDK for JavaScript - Aborter

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

Save [CouchDB sequence #s](http://docs.couchdb.org/en/2.1.1/api/database/changes.html#changes-feeds) to a configurable backend. This allows you to resume CouchDB replication from the point where you left off.

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

Decode JWT tokens, mostly useful for browser applications.

https module compatability for browserify

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

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.

A WebSocket-TCP proxy that enables PostgreSQL clients to connect to a Postgres database running in the browser

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

Library providing embeddability, multi-tenancy, replication, automatic snapshotting, and branching of SQLite databases at scale.

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

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

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

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

Serializes any DOM node into a String

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

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

SQLocal makes it easy to run SQLite3 in the browser, backed by the origin private file system.

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

Universal Storage for KVS.

Tests if ES6 @@toStringTag is supported.

Tests if ES6 Symbol is supported.

A generated SDK for CosmosDBForPostgreSQL.

Isomorphic client library for Azure KeyVault's keys.

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

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

Extends Chai with assertions about promises.

an eventually consistent database

sort module-deps output for deterministic browserify bundles

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

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

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.

Simple JSON database for node and browser

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

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

Array#filter for older browsers.

XMLHttpRequest emulation for node.js

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

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

Simple JS stack with auto run for node and browsers

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

OpenTelemetry instrumentation for fetch http client in web browsers

Analyze and debug space usage through source maps

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

A generated SDK for ResourceManagementClient.

Check if mobile browser.

An simple, dependency free, require & go node.js and browser database

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Minimal JavaScript module loader

Create a MD5 hash with hex encoding

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

File manager plugin for CKEditor 5

A client for working with the BrowserStack APIs.

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

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

Cross Platform implementation of the GitLab API

Mouse wheel normalization across multiple multiple browsers.

`[].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

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.

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

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

Lint browser compatibility of API used

Usercentrics CMP Browser SDK

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

Simple JS queue with auto run for node and browsers

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.

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

strings comparison matchers for chai

Javascript audio library for the modern web.

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.

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

Google's libphonenumber pre-compiled with the closure compiler

Environment utilities

Logger Utils

Database Manager with optional encryption for SQLite in the browser.

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

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

A pure JavaScript client for the tus resumable upload protocol

Compress images in the browser

✍ Easy to use local JSON database

Normalize browsers' default style

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

Microsoft Azure Storage SDK for JavaScript - Queue

Tiny local JSON database for Node, Electron and the browser

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

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.

Tiny local JSON database for Node, Electron and the browser

Faro instrumentations, metas, transports for web.

Auto mock all localstorage and sessionstorage APIs for your Jest tests

UI utilities

Populate a <canvas> element with a font texture atlas

Chromium Binary for Serverless Platforms

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

Extend Chai Assertion library with tests for http apis

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

small function to append a query string to a URL

<!-- markdownlint-disable MD024 -->

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

browserify compatible version of the ace editor.

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.