Why doesn't Person.call(this, firstName, lastName); work?

Question

I get an error message that the Person object will set the first and last name properties. I have no idea what the editor is on about. I mimicked the call used in the video tutorial on inheritance:
```Javascript
    Media.call(this, title, duration);
```
```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) {
  this.firstName = firstName;
  this.lastName = lastName;
  this.room = roomNumber;
  Person.call(this, firstName, lastName);
}//Teacher
```

Sara Hardy · Accepted Answer

You don't need to call this.firstName = firstName; and this.lastName = lastName; inside Teacher because those will be set inside Person. You can remove those lines. You will still need to set this.room = roomNumber; because that is specific to just a Teacher.

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Adiv Abramson

Adiv Abramson

Why doesn't Person.call(this, firstName, lastName); work?

1 Answer

Sara Hardy

Sara Hardy

Adiv Abramson

Adiv Abramson

MUZ140884 Maxwell Makumucha

MUZ140884 Maxwell Makumucha