Prototypal Inheritance

jsinheritance.js

function Person(firstname, lastname){
  this.firstname = firstname;
  this.lastname = lastname;
}

function Teacher(firstname, lastname, subject){
  Person.call(this, firstname, lastname);
  this.subject = subject;
}

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

console.log(Teacher);
console.log(Teacher.prototype);

var teacher = new Teacher("John", "Doe", "math");

console.log(teacher);

This is a quick example of inheritance as I understand it.