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	---
null	object	---
Booleans	boolean	Boolean
Numbers	number	Number
String	string	String
Functions	function	Function
Array	object	Array
Object	object	Object
Date	object	Date
RegExp	object	RegExp

Be careful!

Everything in JavaScript acts like an object, with the only two exceptions being null and undefined. *JavaScript Garden Typeis.js acts like an property; doesn't work null and undefined types because they doesn't have properties.

Download

• typeis.js ~813 B (413 B gzipped)
• typeis.min.js ~305 B (226 B gzipped)

Installation

npm install typeis
bower install typeis

Usage

In Node.js:

require('typeis');

In a browser:

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

Examples

Property usage will not available after ^2.0 anymore, please use function typeis(variable, [type]) Basic type checking

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

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

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