//person.js// person data object. setter getter 만드는 방법 var firstName, lastName, age; exports.setFirstName = function (fname) { firstName = fname;}; exports.setLastName = function (lname) { lastName = lname;}; exports.setAge = function (yrsold) { age = yrsold;}; exports.getPersonInfo = function () { return { firstName: firstName, lastName: lastName, age: age };};----------------------------------..