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

ES2015 `Object.assign()` ponyfill

Array#isArray for older browsers

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

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

Determine if an object is a Buffer

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

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 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.

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

the stream module from node core for browsers

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

JavaScript's functional programming helper library.

A simple, lightweight JavaScript API for handling cookies

JavaScript library for DOM operations

HTML5 `FormData` for Browsers and Node.

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

Parse and stringify URL query strings

Convert a typed array to a Buffer without a copy

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

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

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

Random number generator for browsers and node.js

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

Parse milliseconds into an object

https module compatability for browserify

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

Decode JWT tokens, mostly useful for browser applications.

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

JSON without touching any globals

Microsoft Azure SDK for JavaScript - Logger

the tty module from node core for browsers

node's constants module for the browser

vm module for the browser

A polyfill for the Resize Observer API

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

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

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

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

Isomorphic implementation of WebSocket

Lazy assertions without performance penalty

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

timers module for browserify

Promisify an event by waiting for it to be emitted

Copy stuff into clipboard using JS with fallbacks

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

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

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

resolve which handles browser field support in package.json

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

Microsoft Azure Storage SDK for JavaScript - Blob

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.

Get a KeyboardEvent.key-style string from an event

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

JavaScript SVG parser and renderer on Canvas.

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

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

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

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

Plugin for loglevel message prefixing

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

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.

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

Topological sort of directed acyclic graphs (like dependecy lists)

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

Serializes any DOM node into a String

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

Isomorphic WebSocket

LRU and FIFO caches for Client or Server

HKDF with no dependencies using runtime's native crypto

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

Dynamic script loading for browser

Simple JS stack with auto run for node and browsers

browser-side require() the node way

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

Tests if ES6 Symbol is supported.

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

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

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

A tool to get browser's scrollbars width.

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

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

Tests if ES6 @@toStringTag is supported.

Browser compatibility data provided by MDN Web Docs

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

Get the paths of edge browser easily

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

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

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

Isomorphic client library for Azure KeyVault's keys.

Extends Chai with assertions about promises.

sort module-deps output for deterministic browserify bundles

Detect device type and render your component according to it

A generated SDK for WebSiteManagementClient.

Unpack a browser type and version from the useragent string

Analyze and debug space usage through source maps

Array#filter for older 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

Create a MD5 hash with hex encoding

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!

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

Node standard library for browser.

Mouse wheel normalization across multiple multiple browsers.

A client for working with the BrowserStack APIs.

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

A generated SDK for ResourceManagementClient.

XMLHttpRequest emulation for node.js

Cross Platform implementation of the GitLab API

Simple JS queue with auto run for node and browsers

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

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

Minimal JavaScript module loader

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

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

Simple JS queue with auto run for node and browsers

Tiny local JSON database for Node, Electron and the browser

File manager plugin for CKEditor 5

tap-producing test harness 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.

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

Check if mobile browser.

Browser port of the Node.js 'request' package

Isomorphic client library for Azure KeyVault's secrets.

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

Lint browser compatibility of API used

OpenTelemetry instrumentation for fetch http client in web browsers

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

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

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

Browser fingerprinting library with the highest accuracy and stability

Javascript audio library for the modern web.

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Test whether value is error object

Logger Utils

A Minimalistic Wrapper for IndexedDB

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

The official Fullstory browser SDK

Environment utilities

Google's libphonenumber pre-compiled with the closure compiler

Lightweight copy to clipboard for the web

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

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

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

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

strings comparison matchers for chai

Compress images in the browser

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

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

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

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

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

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.

Lint CSS for browser support against caniuse database

Auto mock all localstorage and sessionstorage APIs for your Jest tests

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

provides locking mechanism to sync across browser tabs

UI utilities

A pure JavaScript client for the tus resumable upload protocol

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.

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

Normalize browsers' default style

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

Extend Chai Assertion library with tests for http apis

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

Populate a <canvas> element with a font texture atlas

tiny http client for Node and the browser

Microsoft Azure Storage SDK for JavaScript - Queue

A companion library to openai for Azure OpenAI.

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

AWS X-Ray ID generator for OpenTelemetry

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

Faro instrumentations, metas, transports for web.

Cascading grid layout library

<!-- markdownlint-disable MD024 -->

Check if a value is a `Blob`

small function to append a query string to a URL

Consistent cross browser mouse wheel movement

browserify compatible version of the ace editor.

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

ExpressJS/Connect/TrinteJS user-agent middleware exposing

Faro web tracing implementation.

memlab API

Javascript string formatter for human readability

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

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

A generated SDK for ContainerInstanceManagementClient.

Fast client-side asset builder

insert a string of css into the <head>

Get the size of an element in pixels, including margins

Check if browser is Firefox

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

Base draggable class

A generated SDK for StorageManagementClient.

Advanced HTTP requests in node.js and browsers

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

Auth0 headless browser sdk

JavaScript barcode generator supporting over 100 types and standards.

Fingerprint JavaScript agent

Chai plugin for JSON Schema v4

Copy to clipboard.

memlab browser E2E interaction libraries

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

Use Ky in both Node.js and browsers

Migrate older jQuery code to jQuery 3.0+

get webrtc browser methods unprefixed

Automated browser testing for the modern web development stack.

Mocha tests in Electron.

Mouse wheel normalization across multiple multiple browsers.

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.

Render React components in Vitest Browser Mode

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

Event based JavaScript for the browser

compute the bounding box of geojson features

AngularJS mocks for testing

A generated SDK for ComputeManagementClient.

React hooks done right, for browser and SSR.