JSPM

Ember CLI addon for detecting missing npm and bower dependencies before executing ember commands

Check if a value is a function

Detect the image type of an ArrayBuffer/Uint8Array

checks whether a hyperlink is alive (200 OK) or dead

checks the all of the hyperlinks in a markdown text to determine if they are alive or dead

Check if a Node.js Buffer or Uint8Array is UTF-8

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

ESLint shareable config for XO with 2-space indent

JavaScript Semistandard Style - ESLint Shareable Config

Validates password according to flexible and intuitive specifications

Check if a Buffer/Uint8Array is a BZIP2 file

ESLint shareable config for React to be used with eslint-config-xo

Check if a string is a valid filename

Test if a finite numeric value is an odd number.

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Checks for URLs during typing and pasting and automatically converts them to links.

allows easy type enforcement for all JS types objects and classes. it is also extensible and provides simple to use type checks for your own custom classes and types

Check the validity of the format of an EU VAT number

Keep your library size in check

Context menu for your Electron app

A collection of functions for working with different casings.

Aids humans and automation in managing npm audit results

Returns true if an object has an own, nested property using dot notation paths ('a.b.c').

Test if a finite double-precision floating-point number is an integer.

is-iojs determines if runtime is io.js.

Check if an object is an array or a typed array

Validate hostname based on RFC-1123

Check if the machine is running Windows or not.

Test if a double-precision floating-point numeric value is positive zero.

Check whether a binary version satisfies a semver range

Test if a value is NaN.

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

Check if the package is being installed by another package

TypeScript Standard Style based on StandardJS

Hunspell compatible spell checker

Check if the process is running as administrator on Windows

Test if a value is a number having an integer value.

Detect the appearance of an element in the browser DOM

Check if a value is undefined or not.

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

Test if a value is a number having a nonnegative integer value.

Test if a finite numeric value is an even number.

Test if a value is an Int32Array.

Test if a value is a Uint8ClampedArray.

Test if a value is an Int16Array.

$(document).ready() for the 21st century

Test if an object's own property is enumerable.

Checks that given package is installed globally or locally.

Async npm module for Node JS that reads the first line of a file

Assert a given object is a valid glob option

Returns true if the current node version matches the given semver expression

Check if the user is running the latest version of the app

Test if a value is a collection.

A pure css library to beautify checkbox and radio buttons.

Test if a value is an Int8Array.

A command line utility to read version from package.json and attach it into your module as a property

All the goodness of `feross/standard` with semicolons sprinkled on top.

Check if the process is running with elevated privileges

Test if a value is an arguments object.

Test if a double-precision floating-point numeric value is negative zero.

ESlint plugin to define custom module dependency rules.

code > prettier > stylelint > formatted code

Markdown TaskList components

Validate glob options

Create an error from the result of validate-glob-opts

Get or set a deep value using a keypath string. Supports bracket and dot notation

Fully customizable animated bouncy checkbox for React Native

Check if a file path is an image

Base58Check encoding

Skema provides a handy & composable way to validate / transform / purify the input data.

A tool to enable the checking, inserting and removal of licenses

Checks if an input string is a capitalized or not.

Standard assertion utilities.

Test if a value is an Error object.

React components for [Stripe.js and Elements](https://stripe.com/docs/stripe-js).

Provides a collection of runtime assertion tools for checking strict equality, type, and range of a set of values.

Test whether a value has in its prototype chain a specified constructor as a prototype property.

allows easy type enforcement for all JS types objects and classes. it is also extensible and provides simple to use type checks for your own custom classes and types

Minimal JavaScript type checking library

Compile TypeScript interfaces into a description that allows runtime validation

*A mostly reasonable approach to JavaScript*

Run your TypeScript type tests using Jest

[](https://github.com/crabas0npm/numquam-corporis-veniam/actions/workflows/ci.yml?query=branch%3Amain) [Chat on slack](https://@crabas0npm

Test if a value is a number having a positive integer value.

Test if a value is an ArrayBuffer.

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

Test if a value is a complex number-like object.

A gulp plugin to lint code with ESLint 8 and 9.

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

Set of various predicates for type checking, assertions, filtering etc

Get or check the current macOS version

Easily expose your http server's health.

Test if a value is a number having a positive value.

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

Test if a value is an array-like object.

Lint CSS for email support against caniemail database.

Assertions and Validations for TypeScript

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

Check if something is a positive number

Determines whether a string ends with the characters of another string.

Run elm-review from Node.js

Test if a value is a Complex64Array.

Test if a value is array-like.

Upcast is a low-level JavaScript type checking and casting library

Type check values: `is.string('🦄') //=> true`

Check types

Check whether a file can be executed

Check if a String/Buffer is TTF

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Check if a file is a directory

Test if a value is a typed array.

Test if a value is a complex typed array.

Check if a number is in a given range

Test if a value is a Complex128Array.

Check if a file path is a video file

Check if an Array is sorted

Test if an array-like object supports the accessor (get/set) protocol.

Test whether a module is available as a dependency

Check if a JavaScript environment has a DOM

ESLint sharable config for strict linting

Test if a value is an array-like object of numbers.

Check that all files match prettier code style.

Utilities for formatting and linting a Dockerfile.

Return a function which tests if every element in an array-like object passes a test condition.

Utility to check if internet is connected or not

Type checking for .eslintrc.json

Check if a String/Buffer/ArrayBuffer is OTF

A light-weight jQuery "dirty forms" Plugin - it monitors HTML forms and alerts users to unsaved changes if they attempt to close the browser or navigate away from the page. (Are you sure?)

Test if a finite double-precision floating-point number is a nonnegative integer.

Tiny, streaming, seedable CRC32 library, compatible with the crypto.Hash API

Check the validity of the format of an EU VAT number

Returns true if an array has duplicate elements or a string has duplicate characters.

Returns true if a value is the global or window object.

Checkbox component for react native, it works on iOS and Android.

Test if a value is typed-array-like.

Validates if a value is a JavaScript object.

Build a navigation structure programatically

Check if NPM package names conflict

Determine if a variable or expression is a React element or component

Library to check variable type and properties in object.

If X, return Y, else throw Z.

Check if something is a negative number

Convert Ethereum address to a checksummed address

Check that given value is valid hex color, using `hex-color-regex` - the best regex for matching hex color values

Build templates for initial values

Check if a string can be used as a JavaScript variable name

Test if a finite double-precision floating-point number is a negative integer.

check if urls are dead or alive

*A mostly reasonable approach to JavaScript*

Check to see if a token is expired using only the token itself without a secret key or validation

Delete files and folders and any intermediate directories if they exist (sync and async).

Validate the name of a custom element

Check if an email domain belongs to an educational instutition

Validates if a value is undefined.

Verifies email domains

A simple function for interrupting program flow if a condition isn’t met.

Checks the integrity of an Endo bundle.

Run commands if on specified node version.

Tiny module for checking if Promise is globally available

Check if an environment is little endian.

Test if an array-like value contains a search value.

Test if two double-precision floating-point numbers are the same value.

Test if a value is a probability.

Check if an object is empty or not.

Check your Vue project for unused Components

*A mostly reasonable approach to JavaScript*

The hasNestedProperty method missing in Object. This module does not extend Object.

Check if a string or buffer ends with a given string

🔌 CLI to check/generate .env files and maintain them synchronized

Create JSON Schema validator from TypeScript.

Robustly checks an array of URLs for liveness.

Check a character if it is a correctly supported emoji.

Test if a finite double-precision floating-point number is a positive integer.

Check if a Buffer/Uint8Array is EOT

Check if a buffer/Uint8Array is a woff2 file

Check if a Buffer/Uint8Array is WOFF

Check if a Buffer/Uint8Array is a FLAC file.

Check if two numbers are equal within a given tolerance

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

Test if a double-precision floating-point number is a probability.

Noir ESLint shareable config

Check if an URL is a valid HTTP URL.

Check whether a string is a valid HTTP URL

Utility for linting a docker file against accepted good practices

Returns `true` if text is upper case only.

Simple, lightweight at-runtime type checking functions, with full TypeScript support

## Overview

Check if a file exists without try catch

Verifies that typescript examples in markdown files actually compile.

Check if node_modules match package.json versions. npm / yarn install shortcut.

Returns `true` if text is lower case only

Test if a value is an array-like object containing only nonnegative integers.

Check for outdated, incorrect, and unused dependencies.

Detect file type by signature

Check if a Buffer/Uint8Array is a m4a file.

Check if a Buffer/Uint8Array is a wav file.

regexp-helper

check RegExp ( regular expressions ) support

Check if a Buffer/Uint8Array is a MP3 file.

Test if a value is an array of strings.

Check if a Buffer/Uint8Array is an OGG file.

regexp-helper-core

ESLint shareable config for the HTML Academy style

Report tests failures from Jest in GitHub

Test if a value is a number having a nonnegative value.

Type check values. This is a fork of sindresorhus/is, but with CommonJS support.

Second generation object or request validator for node.js

JavaScript Standard Style JSDoc support - ESLint Shareable Config

Checks if a newer version is available for command line interfaces

Check if an Iterable is empty

Test if a value is Node stream-like.

Check if a URL exists.

Test if a value is Node writable stream-like.

Test if a value is an array of probabilities that sum to one.

[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![dependency status][deps-svg]][deps-url] [![dev dependency status][dev-deps-svg]][dev-deps-url] [![License][license-image]][license-url] [![Downloads][downloads-im

Test if something is an object literal

Detect when an element is ready in the DOM

Test if a value is a DataView.

Keep your package.json version requirements satisfied

Add support to do 'Spell checking', with a toggle on/off option in Settings

Test if a value is null.

Detect if DevTools is open and its orientation

*一种写JavaScript更合理的代码风格。*

An ESLint Shareable Config for video.js Standard Style.

Check the licenses for the packages that you are using

Validates if a value is NaN.

Unit tests for .d.ts TypeScript definitions

Check to see if a directory exists

Checks if package-lock.json is Up To Date (= UTD)

Validates if a value is a string.

Stylelint shareable config for XO

Shallow check two arrays for strict equality

check json object matches template

Validates if a value is a boolean.

Check for a valid Number value.

Test if a value is ndarray-like.

Check that email addresses are really able to accept emails by pinging the DNS and checking for active MX records.

A straightforward implementation of base58-check encoding

Generate JavaScript-compatible regular expressions with chinese/jp/zh/cn

Validate JavaScript code and report possible syntax errors

Validates if a value is a NaN primitive.

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

Test if an input value is an ndarray order.

Node.js service tools for common use cases

ESlint plugin to enforces the access of specific return types.

A simple and fully customizable React checkbox input component.

CLI tool to check your npm dependencies against a list of allowed/forbidden packages.

Validates if a value is a URI.

A react-native solution to check if your app runs under battery optimization on Android devices and makes it easy for the user to disable it.

Check favicon with RealFaviconGenerator from the CLI