core-js/internals/is-integral-number.js

'use strict';
var isObject = require('../internals/is-object');

var floor = Math.floor;

// `IsIntegralNumber` abstract operation
// https://tc39.es/ecma262/#sec-isintegralnumber
// eslint-disable-next-line es/no-number-isinteger -- safe
module.exports = Number.isInteger || function isInteger(it) {
  return !isObject(it) && isFinite(it) && floor(it) === it;
};