@fav/type.is-integer

Checks whether a value is an integer or not.

Usage no npm install needed!

<script type="module">
  import favTypeIsInteger from 'https://cdn.skypack.dev/@fav/type.is-integer';
</script>

README

@fav/type.is-integer NPM MIT License Build Status Build Status Coverage status

Checks whether a value is an integer or not.

"fav" is an abbreviation of "favorite" and also the acronym of "for all versions". This package is intended to support all Node.js versions and many browsers as possible. At least, this package supports Node.js >= v0.10 and major Web browsers: Chrome, Firefox, IE11, Edge, Vivaldi and Safari.

Install

To install from npm:

$ npm install --save @fav/type.is-integer

NOTE: npm < 2.7.0 does not support scoped package, but old version Node.js supports it. So when you use such older npm, you should download this package from github.com, and move it in node_modules/@fav/type.is-integer/ directory manually.

Usage

For Node.js:

var isInteger = require('@fav/type.is-integer');
isInteger(123); // => true
isInteger(4.56); // => false
isInteger(Infinity); // => false
isInteger(NaN); // => false

isInteger.not(123); // => false
isInteger.not(4.56); // => true
isInteger.not(Infinity); // => true
isInteger.not(NaN); // => true

For Web browsers:

<script src="fav.type.is-integer.min.js"></script>
<script>
var isInteger = fav.type.isInteger;
isInteger(123); // => true
isInteger.not(123); // => false
</script>

API

isInteger(value) : boolean

Checks if value is an integer, which has no dicimal place and is neither a positive/negative infinity, nor NaN.

Parameter:

Parameter Type Description
value any The value to be checked.

Return:

True, if value is an integer.

Type: boolean

isInteger.not(value) : boolean

Checks if value is not an integer.

This function always returns a negative boolean of isInteger(value).

Parameter:

Parameter Type Description
value any The value to be checked.

Return:

True, if value is not an integer.

Type: boolean

Checked

Node.js (4〜)

Platform 4 5 6 7 8 9 10
macOS
Windows10
Linux

io.js (1〜3)

Platform 1 2 3
macOS
Windows10
Linux

Node.js (〜0.12)

Platform 0.8 0.9 0.10 0.11 0.12
macOS
Windows10
Linux

Web browsers

Platform Chrome Firefox Vivaldi Safari Edge IE11
macOS -- --
Windows10 --
Linux -- -- --

License

Copyright (C) 2017-2018 Takayuki Sato

This program is free software under MIT License. See the file LICENSE in this distribution for more details.