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

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

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

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

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

JavaScript library for DOM operations

Public API for OpenTelemetry

Microsoft Azure SDK for JavaScript - Aborter

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

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

Parse and stringify URL query strings

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

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

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

High performance (de)compression in an 8kB package

JavaScript's functional programming helper library.

Parse milliseconds into an object

Decode JWT tokens, mostly useful for browser applications.

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

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

node's constants module for the browser

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

Random number generator for browsers and node.js

the tty module from node core for browsers

Convert a typed array to a Buffer without a copy

vm module for the browser

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

A polyfill for the Resize Observer API

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

Lazy assertions without performance penalty

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

https module compatability for browserify

Copy stuff into clipboard using JS with fallbacks

Microsoft Azure SDK for JavaScript - Logger

Promisify an event by waiting for it to be emitted

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

JSON without touching any globals

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

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.

Get a KeyboardEvent.key-style string from an event

Isomorphic implementation of WebSocket

timers module for browserify

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

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

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

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

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

Toggle current selected content in browser

Tiny and elegant HTTP client based on the Fetch API

Microsoft Azure Storage SDK for JavaScript - Blob

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

resolve which handles browser field support in package.json

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.

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

JavaScript SVG parser and renderer on Canvas.

Serializes any DOM node into a String

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

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

HKDF with no dependencies using runtime's native crypto

Isomorphic WebSocket

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

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.

Tests if ES6 Symbol is supported.

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.

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

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

Topological sort of directed acyclic graphs (like dependecy lists)

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

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

Unpack a browser type and version from the useragent string

Simple JS stack with auto run for node and browsers

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

browser-side require() the node way

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

Array#filter for older browsers.

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

Node standard library for browser.

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

A generated SDK for ResourceManagementClient.

A tool to get browser's scrollbars width.

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

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.

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

Minimal JavaScript module loader

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

Browser compatibility data provided by MDN Web Docs

Tiny local JSON database for Node, Electron and the browser

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

Isomorphic client library for Azure KeyVault's keys.

Detect device type and render your component according to it

sort module-deps output for deterministic browserify bundles

Extends Chai with assertions about promises.

Browser port of the Node.js 'request' package

A generated SDK for WebSiteManagementClient.

Analyze and debug space usage through source maps

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

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

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

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!

Mouse wheel normalization across multiple multiple browsers.

Create a MD5 hash with hex encoding

A client for working with the BrowserStack APIs.

Test whether value is error object

Cross Platform implementation of the GitLab API

XMLHttpRequest emulation for node.js

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

Simple JS queue with auto run for node and browsers

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

strings comparison matchers for chai

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

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

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

Simple JS queue with auto run for node and browsers

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

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

Lint browser compatibility of API used

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

Isomorphic client library for Azure KeyVault's secrets.

tap-producing test harness for node and browsers

File manager plugin for CKEditor 5

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 if mobile browser.

OpenTelemetry instrumentation for fetch http client in web browsers

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

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

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

OpenTelemetry instrumentation for XMLHttpRequest http client in web browsers

Javascript audio library for the modern web.

Environment utilities

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

Logger Utils

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

The official Fullstory browser SDK

A Minimalistic Wrapper for IndexedDB

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)

Google's libphonenumber pre-compiled with the closure compiler

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

Lightweight copy to clipboard for the web

A pure JavaScript client for the tus resumable upload protocol

Extend Chai Assertion library with tests for http apis

Compress images in the browser

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

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

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

tiny http client for Node and the browser

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.

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

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

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

Check if a value is a `Blob`

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.

provides locking mechanism to sync across browser tabs

Auto mock all localstorage and sessionstorage APIs for your Jest tests

Consistent cross browser mouse wheel movement

browserify compatible version of the ace editor.

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

Normalize browsers' default style

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

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

Microsoft Azure Storage SDK for JavaScript - Queue

Populate a <canvas> element with a font texture atlas

AWS X-Ray ID generator for OpenTelemetry

A companion library to openai for Azure OpenAI.

Copy to clipboard.

Render React components in Vitest Browser Mode

Automated browser testing for the modern web development stack.

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.

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)

return all coordinates from a geojson object

<!-- markdownlint-disable MD024 -->

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

React hooks done right, for browser and SSR.

Faro web tracing implementation.

ExpressJS/Connect/TrinteJS user-agent middleware exposing

Javascript string formatter for human readability

memlab API

A generated SDK for NetworkManagementClient.

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

Fast client-side asset builder

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

Auth0 headless browser sdk

Utility library to determine and normalize Element.scrollLeft behavior

a geographic extent object

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

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

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

Advanced HTTP requests in node.js and browsers

JavaScript barcode generator supporting over 100 types and standards.

A generated SDK for ContainerInstanceManagementClient.

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

compute the bounding box of geojson features

Fingerprint JavaScript agent

A generated SDK for StorageManagementClient.

insert a string of css into the <head>

Use Ky in both Node.js and browsers

Chai plugin for JSON Schema v4

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

memlab browser E2E interaction libraries

get webrtc browser methods unprefixed