is-number/index.js

"use strict";

const ValidationError = require("@validatem/error");
const isNumberObject = require("./is-number-object");

// FIXME: Document that NaN is not permitted but Infinity is

module.exports = function (value) {
	if (!isNumberObject(value)) {
		throw new ValidationError("Must be a number", { code: "validatem.is-number.number" });
	} else if (Number.isNaN(value)) {
		throw new ValidationError(`Must be a number (must not be NaN)`, { code: "validatem.is-number.nan" });
	}
};