Easy to use, fast and lightweight library for Node.js.

[!WARNING] This project is under development and is not yet ready for use.

🌱 Overview

This library is a collection of functions that help you to check the type of a variable in JavaScript and TypeScript.

✨ Features

Infer the type

• [x] isArray
• [x] isArrayBuffer
• [x] isBigInt
• [x] isBlob
• [x] isBoolean
• [x] isBuffer
• [x] isDate
• [x] isEnum
• [x] isError
• [x] isFunction
• [x] isNothing
• [x] isNull
• [x] isNullOrUndefined
• [x] isNumber
• [x] isObject
• [x] isPromise
• [x] isRegExp
• [x] isString
• [x] isSymbol
• [x] isUndefined
• [x] isURL
• [x] isURLSearchParams
• [x] isVoid

Check the value

• [x] isFalsy
• [x] isNaNumber
• [x] isTruthy

🚀 Tecnologies

The following tools were used in the construction of the project:

• Jest
• Node.js
• TypeScript

📦 Install

Use the package manager npm, yarn.

npm install @geisonjr/typefy

yarn add @geisonjr/typefy

🏗️ Usage

Example with True Condition

import { isBoolean } from '@geisonjr/typefy'

let test: any = true // false

// Is `true` if the value is a boolean type
if (isBoolean(test)) {
	// The intelisense will be recognize the variable as a boolean
	console.log('This is a boolean')
}

// Output: This is a boolean

Example with False Condition

import { isNumber } from '@geisonjr/typefy'

let test: any = '123'

// Is `true` if the value is a number type
if (isNumber(test)) {
	// The intelisense will be recognize the variable as a number
	console.log('This is a number')
} else {
	// The intelisense will be recognize the variable not as a number
	console.log('This is not a number')
}

// Output: This is not a number

📋 License

This project is under the MIT License