FAQ: Classes - Inheritance IV


This community-built FAQ covers the “Inheritance IV” exercise from the lesson “Classes”.

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This exercise can be found in the following Codecademy content:

Web Development

Introduction To JavaScript

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I did everything right and the checkboxes lit up but I see an error. Is this what is supposed to happen?

// code begins here
class HospitalEmployee {
constructor(name) {
this._name = name;
this._remainingVacationDays = 20;

get name() {
return this._name;

get remainingVacationDays() {
return this._remainingVacationDays;

takeVacationDays(daysOff) {
this._remainingVacationDays -= daysOff;

class Nurse extends HospitalEmployee {
constructor(name, certifications) {
this._certifications = certifications;

const nurseOlynyk = new Nurse(‘Olynyk’, [‘Trauma’,‘Pediatrics’]);
nurseOlynyk.takeVacationDays(5); // I did this right and it took me to the next task
console.log(nurseOlynyk.remainingVacationDays()); // I did this right but instead of printing something I got an error, but it still said I got it right.

// here is the error code

TypeError: nurseOlynyk.remainingVacationDays is not a function
at Object. (/home/ccuser/workspace/learn-javascript-classes-classes-inheritance-iv/main.js:29:25)
at Module._compile (module.js:571:32)
at Object.Module._extensions…js (module.js:580:10)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Module.runMain (module.js:605:10)
at run (bootstrap_node.js:427:7)
at startup (bootstrap_node.js:151:9)
at bootstrap_node.js:542:3


Nevermind. I figured it out. It was the ().

Even though I included it which I should not have it still said it was the right answer. I went back in, reset and asked for the solution and that’s how I found out that is should not have included the ().



Thanks! I think I figured it out just a few seconds after and tried to delete my post :slight_smile:


I got it nice solution