Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript Object-Oriented JavaScript (2015) Prototypal Inheritance Setting Up the Prototype Chain

Daniel Wright
Daniel Wright
5,672 Points

i cant figure out the answer

function Teacher(firstName, lastName, roomNumber) { Person.call(this, firstName, lastName); this.firstName = firstName; this.lastName = lastName; this.room = roomNumber; }

why is this not working? it says i dont need the firstname and lastname because the this takes care of that. when i take it away again it says i need it.

person.js
function Person(firstName, lastName) {
  this.firstName = firstName;
  this.lastName = lastName;
}

Person.prototype.fullName = function() {
 return this.firstName + " " + this.lastName; 
};
teacher.js
function Teacher(firstName, lastName, roomNumber) {
  Personcall(this, firstName, lastName);
  this.firstName = firstName;
  this.lastName = lastName;
  this.room = roomNumber;
}

1 Answer