IsInteger.js

'use strict';

var GetIntrinsic = require('../GetIntrinsic');

var $Math = GetIntrinsic('%Math%');

var $floor = $Math.floor;
var $abs = $Math.abs;

var $isNaN = require('../helpers/isNaN');
var $isFinite = require('../helpers/isFinite');

// https://www.ecma-international.org/ecma-262/6.0/#sec-isinteger

module.exports = function IsInteger(argument) {
	if (typeof argument !== 'number' || $isNaN(argument) || !$isFinite(argument)) {
		return false;
	}
	var abs = $abs(argument);
	return $floor(abs) === abs;
};