is-number-object

is-number-object

Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Example

var isNumber = require('is-number-object');
var assert = require('assert');

assert.notOk(isNumber(undefined));
assert.notOk(isNumber(null));
assert.notOk(isNumber(false));
assert.notOk(isNumber(true));
assert.notOk(isNumber('foo'));
assert.notOk(isNumber(function () {}));
assert.notOk(isNumber([]));
assert.notOk(isNumber({}));
assert.notOk(isNumber(/a/g));
assert.notOk(isNumber(new RegExp('a', 'g')));
assert.notOk(isNumber(new Date()));

assert.ok(isNumber(42));
assert.ok(isNumber(NaN));
assert.ok(isNumber(Infinity));
assert.ok(isNumber(new Number(42)));

Tests

Simply clone the repo, npm install, and run npm test

Similar packages

Other packages similar to is-number-object

is-number

The is-number package checks if a value is a number, including both primitive numbers and number objects. It is more general than is-number-object, which only checks for number objects. This makes is-number useful for broader type checking scenarios.

lodash.isnumber

lodash.isnumber is a utility from the Lodash library that checks if a value is classified as a number primitive or object. It provides similar functionality to is-number-object but is part of the larger Lodash utility library, which offers a wide range of additional functions.