Jenis

Jenis is a small js utility to check your data type.

INSTALLATION

Add jenis to your project using npm or yarn: npm i jenis or yarn add jenis

API

There are two ways to check your data type using Jenis:

Using jenis.is.[type] or jenis.not.[type]

.is and .not behaves the same way. It will compare your input to the rules then return boolean result.

Example

const jenis = require('jenis')

jenis.is.array(['apple', 'banana']) // true
jenis.not.array(['apple','banana']) // false

Type	Param	Returns	Example
string	any	boolean	jenis.is.string('Hello world') // true
array	any	boolean	jenis.is.array([]) // true
object	any	boolean	jenis.is.object({}) // true
number	any	boolean	jenis.is.number(1) // true
function	any	boolean	jenis.is.function(function test(){}) // true
null	any	boolean	jenis.is.null(null) // true
undefined	any	boolean	jenis.is.undefined() // true
boolean	any	boolean	jenis.is.boolean(false) // true
regexp	any	boolean	jenis.is.regexp(new RegExp) // true
error	any	boolean	jenis.is.error(new Error) // true
date	any	boolean	jenis.is.date(new Date) // true
symbol	any	boolean	jenis.is.symbol(Symbol()) // true
promise	any	boolean	jenis.is.promise(new Promise(function (resolve, reject) {})) // true

Using .check()

The check method will let you check what type of data supplied. This method return a string of data type, which can be one of the following:

• undefined
• string
• array
• object
• number
• function
• null
• boolean
• regexp
• error
• date
• symbol
• promise

Example

const jenis = require('jenis')

jenis.check('My string') // string

TODO:

• Create test
• Add Travis CI