Simple use of classes and inheritance:

• Interface: A simple interface that defines the interface for something that can drive.
• Class: An implementation of a car.

Want to experiment? Try adding a second interface: Flyable. Implement it in a Helicopter class, then write a FlyingCar class that implements both Drivable and Flyable!

interface Flyable { ... }
class Helicopter implements Flyable { ... }
class FlyingCar implements Drivable, Flyable { ... }

tsc --sourcemap interfaces.ts