Package Exports

handy-types

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Readme

Handy-Types

A small library to check variable types. It consists of many utility functions like int, positive_int, array, non_empty_array and many more. Every type(function) has their full name in case you want to write a meaningful error message. The library is fully tested so it has 100% test coverage. It uses the UMD module system so it supports every javascript environment.

Example

const { types, typeNames } = require("handy-types");
// Or: import { types, typeNames } from "handy-types";

const user = {};

if(!types.ne_object(obj)) // or use the long form: types.non_empty_object(obj)
  throw new Error(`"user" must be of type "${typeNames.ne_object}"`);

All the available types are listed below.

Number Types

Type	Full Name	Alias
number	Number
finite_num	Finite Number
positive_number	Positive Number	p_number
negative_number	Negative Number	n_number

Integer Types

Type	Full Name	Alias
integer	Integer	int
safe_int	Safe Integer
odd	Odd Number
even	Even Number
natural_num	Natural Number
positive_int	Positive Integer	p_int
negative_int	Negative Integer	n_int

Primitive Integer

Type	Full Name	Range
int8	8 Bit Integer	-128 to 127
uint8	8 Bit Unsigned Integer	0 to 255
int16	16 Bit Integer	-32,768 to 32,767
uint16	16 Bit Unsigned Integer	0 to 65,535
int32	32 Bit Integer	-2,147,483,648 to 2,147,483,647
uint32	32 Bit Unsigned Integer	0 to 4,294,967,295

String Types

Type	Full Name	Alias
string	String
empty_string	Empty String	es
non_empty_string	Non-Empty String	ne_string

Object Types

Type	Full Name	Alias
object	Object
empty_object	Empty Object	eo
non_null_object	Non-Null Object	nn_object
non_empty_object	Non-Empty Object	ne_object

Array Types

Type	Full Name	Alias
array	Array
empty_array	Empty Array	ea
non_empty_array	Non-Empty Array	ne_array

Global Objects

Type	Full Name	Alias
regex	Regular Expression
date	Date
set	Set
map	Map

Function Type

Type	Full Name	Alias
function	Function

Symbol Type

Type	Full Name	Alias
symbol	Symbol

Boolean Type

Type	Full Name	Alias
boolean	Boolean
truthy	Truthy
falsy	Falsy

Constants

Type	Full Name	Alias
true	True
false	False
undefined	Undefined
null	Null
NaN	Not A Number

Other Types

Type	Full Name	Alias
defined	Defined
any	Any

If you find any bug or want to add a new type feel free to make a pull request.