Is finite number

Widely supported version of Number.isFinite. Checks whether a value is a finite number.

Also check out is-non-nan-num, which is similar but does accept Infinity and -Infinity.

Installation

<pnpm|npm|yarn> add is-fin-num

Usage

import isFinNum from 'is-fin-num'

console.log(isFinNum(0))        // => true 🤙
console.log(isFinNum(-123))     // => true 🤙

console.log(isFinNum(Infinity)) // => false ❌
console.log(isFinNum(NaN))      // => false ❌
console.log(isFinNum(0/0))      // => false ❌
console.log(isFinNum('1'))      // => false ❌
console.log(isFinNum([]))       // => false ❌

See test/index.test.js for more use cases.

Browser support

isFinNum relies on isFinite (instead of Number.isFinite) so it should basically work everywhere.

| Browser | Minimum version | | ---------------------- | --------------- | | Firefox | >=1 | | Safari | >=1 | | Edge | >=12 | | Chrome | >=1 | | Internet Explorer (IE) | >=4 |