In Javascript, "Everything is (or acts like) an Object" We need to write "typeis.js" due to a problem (type check) arised other than except the conveniences it is a providing to us.

typeis.js

Typeis. it's the smart and simple javascript type check and validation library ~226 Bytes;

Value	Native	Typeis.js
Undeclared variables	undefined	---
undefined	undefined	Undefined
null	object	Null
Booleans	boolean	Boolean
Numbers	number	Number
String	string	String
Functions	function	Function
Array	object	Array
Object	object	Object
Date	object	Date
RegExp	object	RegExp

Download

Installation

npm install typeis
bower install typeis

Usage

In Node.js:

require('typeis');

In a browser:

<script src="typeis.js"></script>

Examples

typeis(variable);
// return Array, Object, RegExp, Date etc.

// OR

new Typeis(variable).get()

Multi type validation

typeis(variable, ['array', 'object']);
// if variable is Array or Object return true otherwise false

Type valition with regex

typeis(variable, 'array|object');
// if variable is Array or object return true otherwise false

typeis(variable, '.+[yep]$');
// if variable type end of "y", "e" and "p" like Array, Date, RegExp return true otherwise false

typeis(variable, '(^(?!array|object).+)[^n]$');
// if variable is Array, Object or ending "n" like Function and Boolean return false otherwise true

Real world Usage

function realWorld( options ){
    if(typeis(options, 'object')){
        //do something
    } else {
        //do another something
    }
}

Browser Support

IE9 and below also support all modern browser.

Changelog

2.0.0-alpha

rewrite library with typescript removed property usage

1.1.2

Property usage warning

1.1.1

Update readme

1.1.0

Multi type validation support

variable.typeis(['array', 'object']);
// if variable is Array or Object return true otherwise false

type validation with regex support

variable.typeis('array|object');
// if variable is Array or object return true otherwise false

1.0

Typeis.js Released

Package detail

@typeis/core

readme