JSPM

Avoid timers throttling by browser when tab is inactive

Avoid timers throttling by browser when tab is inactive

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

The string_decoder module from Node core

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.

A simple activity monitor to alert you when the user becomes active or inactive

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

Determine if an object is a Buffer

Base class for node which OpenTelemetry instrumentation modules extend

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

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

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

Public logs API for OpenTelemetry

Lightweight browser detector

Public API for OpenTelemetry

Universal WHATWG Fetch API for Node, Browsers and React Native

Microsoft Azure SDK for JavaScript - Aborter

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

JavaScript library for DOM operations

the stream 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

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

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

Get the default browser

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

High performance (de)compression in an 8kB package

JavaScript's functional programming helper library.

Parse and stringify URL query strings

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

A simple, lightweight JavaScript API for handling cookies

Convert a typed array to a Buffer without a copy

HTML5 `FormData` for Browsers and Node.

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

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

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

Decode JWT tokens, mostly useful for browser applications.

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

node's constants module for the browser

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

A polyfill for the Resize Observer API

https module compatability for browserify

JSON without touching any globals

Microsoft Azure SDK for JavaScript - Logger

Lazy assertions without performance penalty

Isomorphic implementation of WebSocket

timers module for browserify

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

Copy stuff into clipboard using JS with fallbacks

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

Promisify an event by waiting for it to be emitted

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

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

Toggle current selected content in browser

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

Get a KeyboardEvent.key-style string from an event

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

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

Isomorphic client library for supporting long-running operations in node.js and browser.

Tiny and elegant HTTP client based on the Fetch API

resolve which handles browser field support in package.json

Microsoft Azure Storage SDK for JavaScript - Blob

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

Check if a value is a natural number

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

Cross-browser `CustomEvent` constructor

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

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

JavaScript SVG parser and renderer on Canvas.

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

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

Serializes any DOM node into a String

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

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

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

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

Plugin for loglevel message prefixing

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.

Isomorphic WebSocket

HKDF with no dependencies using runtime's native crypto

LRU and FIFO caches for Client or Server

🔥 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)

Tests if ES6 Symbol is supported.

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

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

Dynamic script loading for browser

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

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

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

browser-side require() the node way

A tool to get browser's scrollbars width.

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

Tests if ES6 @@toStringTag is supported.

DOMParser.parseFromString for XML with IE8 fallback

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

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

Isomorphic client library for Azure KeyVault's keys.

Unpack a browser type and version from the useragent string

Extends Chai with assertions about promises.

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

Array#filter for older browsers.

Browser compatibility data provided by MDN Web Docs

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

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

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

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

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

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

Get the paths of edge browser easily

sort module-deps output for deterministic browserify bundles

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!

A generated SDK for ResourceManagementClient.

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

A generated SDK for WebSiteManagementClient.

Analyze and debug space usage through source maps

Detect device type and render your component according to it

XMLHttpRequest emulation for node.js

Minimal JavaScript module loader

Create a MD5 hash with hex encoding

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

Mouse wheel normalization across multiple multiple browsers.

Tiny local JSON database for Node, Electron and the browser

A client for working with the BrowserStack APIs.

Cross Platform implementation of the GitLab API

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

Browser port of the Node.js 'request' package

Simple JS queue with auto run for node and browsers

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

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

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

tap-producing test harness for node and browsers

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

Test whether value is error object

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.

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

File manager plugin for CKEditor 5

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

OpenTelemetry instrumentation for fetch http client in web browsers

Check if mobile browser.

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

Isomorphic client library for Azure KeyVault's secrets.

Lint browser compatibility of API used

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

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

Javascript audio library for the modern web.

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

Browser fingerprinting library with the highest accuracy and stability

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

strings comparison matchers for chai

watch mode for browserify builds

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

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

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

A Minimalistic Wrapper for IndexedDB

Logger Utils

Google's libphonenumber pre-compiled with the closure compiler

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

The official Fullstory browser SDK

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

Environment utilities

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

Lightweight copy to clipboard for the web

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

Compress images in the browser

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

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

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)

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

Lint CSS for browser support against caniuse database

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

A pure JavaScript client for the tus resumable upload protocol

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

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

Extend Chai Assertion library with tests for http apis

Auto mock all localstorage and sessionstorage APIs for your Jest tests

tiny http client for Node and the browser

UI utilities

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

provides locking mechanism to sync across browser tabs

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.

Chromium Binary for Serverless Platforms

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

Normalize browsers' default style

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

Check if a value is a `Blob`

browserify compatible version of the ace editor.

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

Consistent cross browser mouse wheel movement

small function to append a query string to a URL

Microsoft Azure Storage SDK for JavaScript - Queue

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

Check if browser is Internet Explorer

A companion library to openai for Azure OpenAI.

AWS X-Ray ID generator for OpenTelemetry

Faro instrumentations, metas, transports for web.

Populate a <canvas> element with a font texture atlas

Cascading grid layout library

Faro web tracing implementation.

<!-- markdownlint-disable MD024 -->

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

ExpressJS/Connect/TrinteJS user-agent middleware exposing

memlab API

Get the size of an element in pixels, including margins

Check if browser is Firefox

Copy to clipboard.

Automated browser testing for the modern web development stack.

Render React components in Vitest Browser Mode

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

Fast client-side asset builder

Javascript string formatter for human readability

Strictly typed EventTarget that directly extends EventTarget to function as a drop-in replacement. It works with all Event-Types and accounts for basically no additional bundle-size.

Mouse wheel normalization across multiple multiple browsers.

React hooks done right, for browser and SSR.

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

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

A lightweight library to decode and verify RS JWT meant for the browser.

return all coordinates from a geojson object

Auth0 headless browser sdk

JavaScript barcode generator supporting over 100 types and standards.

A generated SDK for StorageManagementClient.

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

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

A generated SDK for ContainerInstanceManagementClient.

Advanced HTTP requests in node.js and browsers

insert a string of css into the <head>

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

Base draggable class

memlab browser E2E interaction libraries

Chai plugin for JSON Schema v4

Fingerprint JavaScript agent

get webrtc browser methods unprefixed

Migrate older jQuery code to jQuery 3.0+

Use Ky in both Node.js and browsers

A generated SDK for NetworkManagementClient.

Utility library to determine and normalize Element.scrollLeft behavior

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