JSPM

Checks if the given value is a window object.

Check if a string only contains alphanumeric characters

Check if a Buffer/Uint8Array is a PNG image

Detect if a device is mouse only, touch only, or hybrid

Check if the internet connection is up

Check if the process is running inside a Podman container

Check if a string is HTML

Check if a Buffer/Uint8Array is a TAR file

Check if a Buffer/Uint8Array is a JPEG image

Check if a Buffer/Uint8Array is a GIF image

Detect native generator function support.

A Svelte action that monitors an element enters or leaves the viewport or a parent element. Performant and efficient thanks to using Intersection Observer under the hood.

Charset Detector - Detect the encoding and language of text files - Use it in the browser, with Node.js, or via CLI

capability.js - javascript environment capability detection

Check if a Buffer/Uint8Array is available for cwebp image source

check if an AST node is a function of some sort

Check if servers are reachable

Check if a value is a `Blob`

Detect native Uint8ClampedArray support.

Check if browser is Firefox

check if an AST node is a MemberExpression, in general or a specific one

Detect if the current device support the specified emoji

Check if browser is Internet Explorer

Detect native Int32Array support.

Detect native Int16Array support.

Detect the language of text

Resolve the preferred locale based on the value of an `Accept-Language` HTTP header.

Detect native Int8Array support.

detect in-app browsers

Detect and validate file types by their signatures (✨magic numbers✨)

Collection of 70+ type, feature & value checks

Returns `true` if a value exists in the given string, array or object.

Detect and Normalize the newline characters

Analyze circular dependencies in your JavaScript/TypeScript projects with Rust.

check if the current node version has async_hooks.

Checks if the given value is null or undefined

Platform detection: NodeJS? React? ReactNative? Expo? etc.

Detect the appearance of an element in the browser DOM

Detect the language of text

Detect native Symbol.iterator support.

@wora NetInfo

Check if a Buffer/Uint8Array is a ZIP file

Checks if the given value is a native function.

React component to detect browser

JavaScript module detecting bots/crawlers/spiders via user-agent

Instantly detect support for WEBP images in the browser in 0.2KB

Detect if current process is a node application or not.

Get the language associated with a file extension or the extensions associated with a language using the data from GitHub's [Linguist YAML file](https://github.com/github/linguist/blob/master/lib/linguist/languages.yml)

Detect the audio type of a Buffer/Uint8Array

Check if a string is a valid filename

Check if a string is an IP address

Detect the image type of an ArrayBuffer/Uint8Array

4-directional swipe detection for react-native.

Count syllables in English words

Check if a Buffer/Uint8Array is a BZIP2 file

Detect native function name support.

Checks that given package is installed globally or locally.

Check if the process is running with elevated privileges

Helpers for handling mobile devices

A proxy to `path`, replacing `\` with `/` for all results

Determine whether an element is completely within the browser viewport

Detect if DevTools is open and its orientation

A React component that renders its children if an ad blocker is detected

Detect if the browser supports the touch events api

Get the name of a project, from package.json, git config, or basename of the current working directory.

JavaScript wrapper for hover and any-hover media queries

JavaScript wrapper for pointer and any-pointer media queries

TypeScript / JavaScript library for detect WebAssembly features in node.js & browser

Check if a JavaScript environment has a DOM

Executes a command when a change is detected in specified files. Not an active file watcher.

Language detection for Javascript. Based on the CLD2 (Compact Language Detector) library from Google. Highly optimized for space and speed. Runs about 10x faster than other libraries. Detects over 160 languages. Full test coverage. Runs on Linux, OS X, an

Check if something is a Node.js stream. This is a fork of sindresorhus/is-stream, but with CommonJS support.

Arcjet runtime detection

Detect which ES6 (ES2015 and above) features are available

Scans a repository directory, searching for a changelog file

Simplify detecting your browser

Get the version of the package.json file found in the given directory or in one of its parents.

Get document, if there’s DOM.

a lightweight Events API for detecting scroll and touch events based on custom sensitivity

detect container resizing

Detects active internet connection, and API server status in Angular application.

Check if the process is running as administrator on Windows

@wora Detect Network

check if an AST node is a call to require()

Detect whether the code is running in TS Node

XML detection plugin for file-type

The React hook to detect if the device is mobile or desktop.

ES6 and ES7 feature detection.

Simple and Performant Language detection library (pure JS and zero dependencies)

react network detection hooks

Detect browser language

JavaScript/TypeScript filter and checker for bad words aka profanity

check if an AST node is a call to require()

Check if a file path is an image

React adblock detector

Detect the MIME type of a Buffer, Uint8Array, ArrayBuffer, ReadableStream, file path and file name, with async method.

Checks the filesystem for potential license files and attempts to detect what they are

Glin-Profanity is a lightweight and efficient npm package designed to detect and filter profane language in text inputs across multiple languages. Whether you’re building a chat application, a comment section, or any platform where user-generated content

find and identify a cycle in a directed graph

Check if a Buffer is a STUN message.

Check whether a file can be executed

Regex for matching dot-directories, like `.git/`

Quickly detect the EOL used in a string.

Check if an Array is sorted

Scrypted OpenVINO Object Detection

Checks if the given value is an array or array-like object.

Lint HTML and template source files for hardcoded (untranslated) strings

Regular expression matching for email addresses. Maintained, configurable, more accurate, and browser-friendly alternative to email-regex. Works in Node v14+ and browsers. Made for Spam Scanner and Forward Email.

🃏 Minimalistic isomorphic library for detection of platform, runtime, APIs and more.

Detect character encoding using ICU

Detect if the network is up (do we have connectivity?)

Check if a String/Buffer/ArrayBuffer is OTF

It's FuckAdBlock with a minimalist API.

Check if a String/Buffer is TTF

Detect native DataView support.

Check if a file path is a video file

Detect native BigInt support.

Detect native ArrayBuffer support.

Utility to check if internet is connected or not

Detect the language of text

Detects where the current browser extension code is being run. Compatible with Firefox, Chrome and derivates.

anchor scroll detect for react

Discover the variable names chosen for each of a file's top-level required modules

Detect copy-pasted and structurally similar code. Supports ES2020 standard (and most proposed features), TS and TSX files. Using Babel 8's parser.

Detects if a file is binary based on its content

A pitch-detection library for node and the browser

Check if a Buffer/Uint8Array is WOFF

a lightweight Events API for detecting scroll and touch events based on custom sensitivity

migration tool for sequelize & typescript users

Detect unused CSS in angular components

Feature detection in the browser before loading polyfill using services like polyfill.io

Detect when an element is ready in the DOM

Detect if a Node.js process is in the debug mode.

check browser and browser's version from userAgent

Converts between RSA key formats, detecting input format (PEM, DER, PKCS1, PKCS8). No OpenSSL needed.

Detects browser and React Native source-code bundlers

Check if a Buffer/Uint8Array is EOT

Detect file type by signature

Check if a Buffer/Uint8Array is a FLAC file.

Detect the character encoding using Google’s compact_enc_det library

Check if a buffer/Uint8Array is a woff2 file

Scrypted CoreML Object Detection

Library to check unused resolvers at Ovrsea

Regular expression for matching words in a string. Support for english, CJK and Cyrillic.

Superset of RESPONSIVE DIRECTIVES to show or hide items according to the size of the device screen and another features in Angular 9

Fork of cld with pre-built binaries for OS X and Linux. Language detection for Javascript. Based on the CLD2 (Compact Language Detector) library from Google. Highly optimized for space and speed. Runs about 10x faster than other libraries. Detects over 16

Check if a Buffer/Uint8Array is a wav file.

Scrypted Video Analysis Plugin. Installed alongside a detection service like OpenCV or TensorFlow.

Detect structural similarities in your code

Scrypted Tensorflow Lite Object Detection

Detect Node.JS (as opposite to browser environment) (reliable)

Check if a Buffer/Uint8Array is an OGG file.

Checks if the given value is a valid array-like index.

Detects whether browser has an active internet connection or not in Angular application.

JavaScript module to check if user agent to return the device and browser.

Check if a Buffer/Uint8Array is a MP3 file.

Check if a Buffer/Uint8Array is a m4a file.

React Native component that notifies if the user is active state or inactive sate (i.e. when the app surface hasn't been touched for more than a certain amount of second than it will be move to Inactive State means Inactive Screen).

Simple module for getting the current mouse position in element or window.

Fast and native browser detection on Windows

Check whether a string has any emoji

React hook for checking mouse acceleration

Read a glob of files, dynamically choosing the reader or requiring the files based on the file extension.

A small and simple utility package that can validate any kind of image. It can detect corrupt files, or invalid image urls

Lightweight React hook for checking health of API services.

Match the words in a string. Support for english, CJK and Cyrillic.

React context provider and hook to check if the internet connection is up

Detect the license of node.js projects and their dependencies

Get details about the current Continuous Integration environment

detect available port

Detect the programming language of any file.

A simple browserify module for telling whether or not a given key has been pressed down.

A CommonJS port from the ESM file-type package. Now fixed to not have 'tarHeaderChecksumMatches' error!

Parse HTTP headers to detect the device type, model, operating system, browser, and crawler information

Check if a Buffer/Uint8Array is a APNG (Animated PNG) image

Detect the current iOS version in the browser

The simplest way for detecting HTML content.

Check if Node script is running on AppVeyor

Scrypted OpenCV Motion Detection Service.

Detectizr is a Modernizr extension to detect device, browser, operating system and screen.

Device resolution detection module

Get the users' most preferred locale/language from your app's available translations with zero dependencies

A microlibrary to detect whether Node.js runs inside a Docker container or not

A browser detection package that uses feature detection instead of user agent

Detect if a visitor is coming through a webview or a native browser using user-agent.

React Native component to handle keyboard detection and adjust view position.

Detect image dimensions via request.

Detect the current chrome version in the browser

Check if a `package-lock.json` is present in the working directory

A device detector plugin of Vue 3

Offline and Online components for Vue

Forked from @wora NetInfo

Convert a mime type to a file extension. It works only with popular mime types and it's super lightweight.

JS Library to detect browser, os and device based on the UserAgent String, forked by John Carmichael for ease of use.

Check if a given string is css compatible color value

Superset of RESPONSIVE DIRECTIVES to show or hide items according to the size of the device screen and another features in Angular 2

Detect lockfiles in the working directory

Detect if Mocha is running

Check if a string is XML

Detect if a string contains traditional or simplified Chinese characters.

Detect whether a terminal or browser supports ansi colors.

Checks if the file path is zip file. It does not read the complete file nor it depends upon file extension

A path of the currently executed npm CLI

Detect the file type of a file, stream, or data

Check whether or not a directory and its descendants are valid

Forked from @wora Detect Network

Detects Dependencies In The Source File.

Utility methods to detect runtimes and load modules dynamically.

Regular expresson for matching dotfiles.

Detect the width and height of images in a stream

Check if a value is an error constructor

Report browser settings like whatsmybrowser.org.

Magic number detector for javascript

Adblock detector

Which GitHub page are you on? Is it an issue? Is it a list? Perfect for your WebExtension or userscript.

React componant that renders based on device

Check if your code is running as an npm script

Convert CSS color strings to RGBA and check whether they are light or dark

Identify the network your users are using!

Hunt down `.only`s before it's too late.

Checks if the browser supports WebP. Cheaply and synchronously.

Detect support for emoji character sets.

Check if a project is using pnpm.

Scrypted ONNX Object Detection

Check if a Buffer/Uint8Array is a WebP image

Detect scroll direction

Check if `npm-shrinkwrap.json` is present in the working directory

A small utility to detect screen (viewport) size (resolution height and width) and listener to resize event with additional features

ECMAScript feature and API detection

Check if your code is running on Heroku

Check if a Buffer/Uint8Array is a 7ZIP file

An *Ackchyually* browser compatible file-type hacky replacement of the `file-type` package. Forked from https://github.com/sindresorhus/file-type

Check if pnpm is available.

Multi Languages Detection for Text-Mining and Natural Language Processing - True ITK - Open Source

React Mobile Detect

CLI to detect the language of text

Return a regular expression to match a native function.

Check if the internet connection is up. This is a fork of sindresorhus/is-online, but with CommonJS support.

Uses AST to extract AMD modules, their parts and an optimized output without unused dependencies while keeping the original format.

ecmascript version detector

Check if a value is a Fetch network error

Check if a Buffer/Uint8Array is a TIFF image

Check if browser is Safari

检测设备类型，根据设备类型渲染内容

Check if a Buffer/Uint8Array is a 7ZIP file

Check if a number is a HTTP success status code

Check if a string is an IP address. This is a fork of sindresorhus/is-ip, but with CommonJS support.

detect container resizing

Live request detection for Mocha

Check if JPEG images are progressive