day5-inheritance.js

/*
Objective
In this challenge, we practice implementing inheritance and use JavaScript prototypes to add a new method to an existing prototype. Check out the attached Classes tutorial to refresh what we've learned about these topics.

Task
We provide the implementation for a Rectangle class in the editor. Perform the following tasks:
- Add an area method to Rectangle's prototype.
- Create a Square class that satisfies the following:
  - It is a subclass of Rectangle.
  - It contains a constructor and no other methods.
  - It can use the Rectangle class' area method to print the area of a Square object.

  Locked code in the editor tests the class and method implementations and prints the area values to STDOUT.
*/

class Rectangle {
    constructor(w, h) {
        this.w = w;
        this.h = h;
    }
}

Rectangle.prototype.area = function() {
    return this.w * this.h;
}

class Square extends Rectangle {
    constructor(s) {
        super(s, s)
    }
}