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

Aaron HARPT
Aaron HARPT
19,845 Points
Posted by Aaron HARPT
Aaron HARPT
19,845 Points

Code challenge question

I am having trouble with the following code challenge:

Now set up the prototype chain for the Teacher prototype to inherit from the Person prototype.

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

1 Answer

Ken Alger
STAFF
Ken Alger
Treehouse Teacher
Ken Alger
Ken Alger
Treehouse Teacher

Aaron;

To create the prototype chain in teacher.js we need to do:

Teacher.prototype = Object.create(Person.prototype);

Mr. Chalkley gives an example of this at about 2:28 in the video preceding the challenge.

Post back if you are still stuck or have additional questions.

Happy coding,

Ken