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

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.

Client to connect to an AceBase realtime database server

Simple JSON database for node and browser

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

Simple client side storage solution written in TypeScript.

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!

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

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

The string_decoder module from Node core

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.

ES2015 `Object.assign()` ponyfill

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

Like Lego For Databases

A javascript port of Matomo device-detector

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

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

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.

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

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

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

Base class for node which OpenTelemetry instrumentation modules extend

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

Public API for OpenTelemetry

Public logs API for OpenTelemetry

Lint CSS for browser support against caniuse database

Universal WHATWG Fetch API for Node, Browsers and React Native

the path module from node core for browsers

Lightweight browser detector

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

Microsoft Azure SDK for JavaScript - Aborter

Convert a typed array to a Buffer without a copy

JavaScript's functional programming helper library.

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

High performance (de)compression in an 8kB package

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

the stream module from node core for browsers

JavaScript library for DOM operations

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

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.

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

Parse and stringify URL query strings

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

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

HTML5 `FormData` for Browsers and Node.

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

Random number generator for browsers and node.js

Decode JWT tokens, mostly useful for browser applications.

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

Parse milliseconds into an object

https module compatability for browserify

Isomorphic implementation of WebSocket

timers module for browserify

JSON without touching any globals

the tty module from node core for browsers

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

vm module for the browser

node's constants module for the browser

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

A polyfill for the Resize Observer API

Toggle current selected content in browser

Lazy assertions without performance penalty

Microsoft Azure SDK for JavaScript - Logger

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

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

Promisify an event by waiting for it to be emitted

Copy stuff into clipboard using JS with fallbacks

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

resolve which handles browser field support in package.json

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

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

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

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

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

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.

JavaScript SVG parser and renderer on Canvas.

Isomorphic WebSocket

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

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

LRU and FIFO caches for Client or Server

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.

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

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

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

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

Topological sort of directed acyclic graphs (like dependecy lists)

Plugin for loglevel message prefixing

Dynamic script loading for browser

A tool to get browser's scrollbars width.

HKDF with no dependencies using runtime's native crypto

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

browser-side require() the node way

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

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

DOMParser.parseFromString for XML with IE8 fallback

Universal Storage for KVS.

Tests if ES6 @@toStringTag is supported.

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

A generated SDK for CosmosDBForPostgreSQL.

Tests if ES6 Symbol is supported.

Isomorphic client library for Azure KeyVault's keys.

Extends Chai with assertions about promises.

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

an eventually consistent database

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

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

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

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

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

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

sort module-deps output for deterministic browserify bundles

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

XMLHttpRequest emulation for node.js

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

Array#filter for older browsers.

Simple JS stack with auto run for node and browsers

A generated SDK for WebSiteManagementClient.

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

Unpack a browser type and version from the useragent string

Browser compatibility data provided by MDN Web Docs

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

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!

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

Node standard library for browser.

Analyze and debug space usage through source maps

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

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

Detect device type and render your component according to it

Get the paths of edge browser easily

Create a MD5 hash with hex encoding

A generated SDK for ResourceManagementClient.

A client for working with the BrowserStack APIs.

tap-producing test harness for node and browsers

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

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

Minimal JavaScript module loader

Cross Platform implementation of the GitLab API

OpenTelemetry instrumentation for fetch http client in web browsers

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

Mouse wheel normalization across multiple multiple browsers.

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

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

Check if mobile browser.

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

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

File manager plugin for CKEditor 5

Browser port of the Node.js 'request' package

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)

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

Test whether value is error object

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

Lint browser compatibility of API used

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

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.

Isomorphic client library for Azure KeyVault's secrets.

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

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

Usercentrics CMP Browser SDK

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

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

Browser fingerprinting library with the highest accuracy and stability

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

Javascript audio library for the modern web.

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

Simple JS queue with auto run for node and browsers

strings comparison matchers for chai

Google's libphonenumber pre-compiled with the closure compiler

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

Logger Utils

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.

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

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

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

Database Manager with optional encryption for SQLite in the browser.

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)

Compress images in the browser

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

✍ Easy to use local JSON database

A pure JavaScript client for the tus resumable upload protocol

Normalize browsers' default style

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

Tiny local JSON database for Node, Electron and the browser

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

provides locking mechanism to sync across browser tabs

Auto mock all localstorage and sessionstorage APIs for your Jest tests

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

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.

Microsoft Azure Storage SDK for JavaScript - Queue

Tiny local JSON database for Node, Electron and the browser

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

Chromium Binary for Serverless Platforms

AWS X-Ray ID generator for OpenTelemetry

Faro instrumentations, metas, transports for web.

UI utilities

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

Populate a <canvas> element with a font texture atlas

small function to append a query string to a URL

Check if a value is a `Blob`

browserify compatible version of the ace editor.

Get the size of an element in pixels, including margins

Check if browser is Firefox

Consistent cross browser mouse wheel movement

<!-- markdownlint-disable MD024 -->

Check if browser is Internet Explorer

tiny http client for Node and the browser