JSPM

Avoid timers throttling by browser when tab is inactive

Avoid timers throttling by browser when tab is inactive

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

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

The string_decoder module from Node core

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

Node.js Buffer API, for the browser

Array#isArray for older browsers

ES2015 `Object.assign()` ponyfill

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

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

Determine if an object is a Buffer

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

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

Universal WHATWG Fetch API for Node, Browsers and React Native

Lightweight browser detector

Public API for OpenTelemetry

Microsoft Azure SDK for JavaScript - Aborter

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

JavaScript library for DOM operations

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

the stream module from node core for browsers

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

A simple, lightweight JavaScript API for handling cookies

Get the default browser

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

High performance (de)compression in an 8kB package

JavaScript's functional programming helper library.

Parse and stringify URL query strings

HTML5 `FormData` for Browsers and Node.

the path module from node core for browsers

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

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

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

Random number generator for browsers and node.js

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

Convert a typed array to a Buffer without a copy

Parse milliseconds into an object

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

Decode JWT tokens, mostly useful for browser applications.

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

the tty module from node core for browsers

vm module for the browser

A polyfill for the Resize Observer API

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

https module compatability for browserify

Microsoft Azure SDK for JavaScript - Logger

JSON without touching any globals

node's constants module for the browser

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

Lazy assertions without performance penalty

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

An alias package for `crypto.randomBytes` in Node.js and/or browsers

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

Promisify an event by waiting for it to be emitted

Isomorphic implementation of WebSocket

timers module for browserify

Copy stuff into clipboard using JS with fallbacks

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

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

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

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

Toggle current selected content in browser

Tiny and elegant HTTP client based on the Fetch API

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

Microsoft Azure Storage SDK for JavaScript - Blob

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

Check if a value is a natural number

Cross-browser `CustomEvent` constructor

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

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

JavaScript SVG parser and renderer on Canvas.

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

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

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

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.

HKDF with no dependencies using runtime's native crypto

Isomorphic WebSocket

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

Serializes any DOM node into a String

Topological sort of directed acyclic graphs (like dependecy lists)

Tests if ES6 Symbol is supported.

LRU and FIFO caches for Client or Server

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

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

Dynamic script loading for browser

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

Simple JS stack with auto run for node and browsers

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

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

browser-side require() the node way

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

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

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

DOMParser.parseFromString for XML with IE8 fallback

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

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

A tool to get browser's scrollbars width.

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

Get the paths of edge browser easily

Tests if ES6 @@toStringTag is supported.

Array#filter for older browsers.

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

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

Browser compatibility data provided by MDN Web Docs

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

Unpack a browser type and version from the useragent string

Isomorphic client library for Azure KeyVault's keys.

Node standard library for browser.

Detect device type and render your component according to it

sort module-deps output for deterministic browserify bundles

Extends Chai with assertions about promises.

A generated SDK for WebSiteManagementClient.

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

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

Analyze and debug space usage through source maps

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

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

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!

Create a MD5 hash with hex encoding

Mouse wheel normalization across multiple multiple browsers.

A client for working with the BrowserStack APIs.

A generated SDK for ResourceManagementClient.

Cross Platform implementation of the GitLab API

XMLHttpRequest emulation for node.js

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

Minimal JavaScript module loader

Simple JS queue with auto run for node and browsers

Tiny local JSON database for Node, Electron and the browser

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

Simple JS queue with auto run for node and browsers

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

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

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

Lint browser compatibility of API used

Isomorphic client library for Azure KeyVault's secrets.

Browser port of the Node.js 'request' package

tap-producing test harness for node and browsers

File manager plugin for CKEditor 5

Check if mobile browser.

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.

OpenTelemetry instrumentation for fetch http client in web browsers

Browser fingerprinting library with the highest accuracy and stability

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

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

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.

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Test whether value is error object

Javascript audio library for the modern web.

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

Environment utilities

Logger Utils

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

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

The official Fullstory browser SDK

A Minimalistic Wrapper for IndexedDB

Google's libphonenumber pre-compiled with the closure compiler

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

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

Lightweight copy to clipboard for the web

strings comparison matchers for chai

watch mode for browserify builds

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

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

Compress images in the browser

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

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

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

Lint CSS for browser support against caniuse database

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

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

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

A pure JavaScript client for the tus resumable upload protocol

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

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

UI utilities

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.

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)

Auto mock all localstorage and sessionstorage APIs for your Jest tests

provides locking mechanism to sync across browser tabs

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

Extend Chai Assertion library with tests for http apis

Normalize browsers' default style

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

Chromium Binary for Serverless Platforms

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

Check if browser is Internet Explorer

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

Consistent cross browser mouse wheel movement

browserify compatible version of the ace editor.

tiny http client for Node and the browser

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

Microsoft Azure Storage SDK for JavaScript - Queue

AWS X-Ray ID generator for OpenTelemetry

Populate a <canvas> element with a font texture atlas

A companion library to openai for Azure OpenAI.

Check if a value is a `Blob`

Faro instrumentations, metas, transports for web.

small function to append a query string to a URL

Cascading grid layout library

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

<!-- markdownlint-disable MD024 -->

Faro web tracing implementation.

ExpressJS/Connect/TrinteJS user-agent middleware exposing

Javascript string formatter for human readability

memlab API

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

Automated browser testing for the modern web development stack.

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

Fast client-side asset builder

Auth0 headless browser sdk

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

Get the size of an element in pixels, including margins

Check if browser is Firefox

Base draggable class

JavaScript barcode generator supporting over 100 types and standards.

Advanced HTTP requests in node.js and browsers

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

A generated SDK for ContainerInstanceManagementClient.

Fingerprint JavaScript agent

A generated SDK for StorageManagementClient.

compute the bounding box of geojson features

Use Ky in both Node.js and browsers

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

Chai plugin for JSON Schema v4

insert a string of css into the <head>

Copy to clipboard.

memlab browser E2E interaction libraries

Render React components in Vitest Browser Mode

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.

Turn a HTML string into DOM elements, cross-platform

get webrtc browser methods unprefixed

Vendor agnostic access to the fullscreen spec api

Migrate older jQuery code to jQuery 3.0+

Event binding component

Mouse wheel normalization across multiple multiple browsers.

Event based JavaScript for the browser

Mocha tests in Electron.

A cross-browser wrapper for the Web Audio API which aims to closely follow the standard.