Why is it necessary to set the prototype constructor?

Question

In the section about inheritance in the MDN article Introduction to Object Oriented Javascript, I noticed they set the prototype.constructor:

// correct the          


        

Answer 1

This has the huge pitfall that if you wrote

Student.prototype.constructor = Student;

but then if there was a Teacher whose prototype was also Person and you wrote

Teacher.prototype.constructor = Teacher;

then the Student constructor is now Teacher!

Edit: You can avoid this by ensuring that you had set the Student and Teacher prototypes using new instances of the Person class created using Object.create, as in the Mozilla example.

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