JSPM

Avoid timers throttling by browser when tab is inactive

Avoid timers throttling by browser when tab is inactive

The string_decoder module from Node core

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

Array#isArray for older browsers

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

Node.js Buffer API, for the browser

ES2015 `Object.assign()` ponyfill

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

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

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

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

Public API for OpenTelemetry

Lightweight browser detector

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 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

Parse and stringify URL query strings

High performance (de)compression in an 8kB package

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

Convert a typed array to a Buffer without a copy

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

the stream module from node core for browsers

JavaScript's functional programming helper library.

Get the default browser

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

A simple, lightweight JavaScript API for handling cookies

Parse milliseconds into an object

Decode JWT tokens, mostly useful for browser applications.

HTML5 `FormData` for Browsers and Node.

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

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

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

Random number generator for browsers and node.js

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

node's constants module for the browser

the tty module from node core for browsers

vm module for the browser

A polyfill for the Resize Observer API

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.

JSON without touching any globals

Isomorphic implementation of WebSocket

Lazy assertions without performance penalty

timers module for browserify

Copy stuff into clipboard using JS with fallbacks

Promisify an event by waiting for it to be emitted

Microsoft Azure SDK for JavaScript - Logger

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

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

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

Toggle current selected content in browser

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

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

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

Get a KeyboardEvent.key-style string from an event

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

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

resolve which handles browser field support in package.json

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

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

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

Tiny and elegant HTTP client based on the Fetch API

Microsoft Azure Storage SDK for JavaScript - Blob

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

Check if a value is a natural number

Cross-browser `CustomEvent` constructor

JavaScript SVG parser and renderer on Canvas.

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

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

Serializes any DOM node into a String

(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.

Isomorphic WebSocket

HKDF with no dependencies using runtime's native crypto

LRU and FIFO caches for Client or Server

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

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.

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.

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

Tests if ES6 Symbol is supported.

Topological sort of directed acyclic graphs (like dependecy lists)

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

A tool to get browser's scrollbars width.

Dynamic script loading for browser

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

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

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

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

Tests if ES6 @@toStringTag is supported.

browser-side require() the node way

Simple JS stack with auto run for node and browsers

DOMParser.parseFromString for XML with IE8 fallback

Isomorphic client library for Azure KeyVault's keys.

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

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

Unpack a browser type and version from the useragent string

Extends Chai with assertions about promises.

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

Array#filter for older browsers.

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

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

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

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!

Node standard library for browser.

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

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

A generated SDK for ResourceManagementClient.

sort module-deps output for deterministic browserify bundles

Browser compatibility data provided by MDN Web Docs

XMLHttpRequest emulation for node.js

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

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

A generated SDK for WebSiteManagementClient.

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

Get the paths of edge browser easily

Minimal JavaScript module loader

Detect device type and render your component according to it

Analyze and debug space usage through source maps

Tiny local JSON database for Node, Electron and the browser

Create a MD5 hash with hex encoding

Browser port of the Node.js 'request' package

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

A client for working with the BrowserStack APIs.

Mouse wheel normalization across multiple multiple browsers.

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

Cross Platform implementation of the GitLab API

Simple JS queue with auto run for node and browsers

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

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

Test whether value is error object

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

tap-producing test harness for node and browsers

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

File manager plugin for CKEditor 5

OpenTelemetry instrumentation for fetch http client in web browsers

Simple JS queue with auto run for node and browsers

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.

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

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

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

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

strings comparison matchers for chai

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

Isomorphic client library for Azure KeyVault's secrets.

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

watch mode for browserify builds

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

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

Lint browser compatibility of API used

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

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

Javascript audio library for the modern web.

A Minimalistic Wrapper for IndexedDB

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

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

Logger Utils

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

The official Fullstory browser SDK

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

Google's libphonenumber pre-compiled with the closure compiler

Environment utilities

Lightweight copy to clipboard for the web

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

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

Lint CSS for browser support against caniuse database

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

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.

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

Compress images in the browser

Extend Chai Assertion library with tests for http apis

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

tiny http client for Node and the browser

Auto mock all localstorage and sessionstorage APIs for your Jest tests

provides locking mechanism to sync across browser tabs

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`

UI utilities

small function to append a query string to a URL

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.

browserify compatible version of the ace editor.

Consistent cross browser mouse wheel movement

Chromium Binary for Serverless Platforms

Microsoft Azure Storage SDK for JavaScript - Queue

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

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

Faro instrumentations, metas, transports for web.

Populate a <canvas> element with a font texture atlas

A companion library to openai for Azure OpenAI.

AWS X-Ray ID generator for OpenTelemetry

Check if browser is Internet Explorer

Cascading grid layout library

<!-- markdownlint-disable MD024 -->

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

Faro web tracing implementation.

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

Mouse wheel normalization across multiple multiple browsers.

ExpressJS/Connect/TrinteJS user-agent middleware exposing

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.

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

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

React hooks done right, for browser and SSR.

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

return all coordinates from a geojson object

memlab API

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

A generated SDK for ContainerInstanceManagementClient.

Fast client-side asset builder

Advanced HTTP requests in node.js and browsers

Javascript string formatter for human readability

insert a string of css into the <head>

A generated SDK for NetworkManagementClient.

JavaScript barcode generator supporting over 100 types and standards.

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

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

Base draggable class

Utility library to determine and normalize Element.scrollLeft behavior

Chai plugin for JSON Schema v4

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

Auth0 headless browser sdk

A generated SDK for StorageManagementClient.

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

memlab browser E2E interaction libraries

A regular expression that matches a CHANGELOG filename

Implementation of the Server-sent events protocol for Node.js and browsers.

a geographic extent object

Fingerprint JavaScript agent