Complete class defenition/description using Typescript

classDescription.ts

// interface ensure class instance shape. Notice that the interface includes the parameters of the constructor, not the properties
interface Vehicle {
    make: string;
    color: string;
    doors: number;
    accelerate(speed: number): string;
    brake(): string;
    turn(direction: 'left' | 'right'): string;
}

class Car implements Vehicle{
    // Properties
    private _make: string;
    private _color: string;
    private _doors: number;
    // Constructor
    constructor(make: string, color: string, doors = 4) {
        this._make = make;
        this._color = color;
        if ((doors % 2) === 0) {
        this._doors = doors;
    } else {
        throw new Error('Doors must be an even number');
    }
    }
    // Accessors
    get make() {
        return this._make;
    }
    set make(make) {
        this._make = make;
    }
    get color() {
        return 'The color of the car is ' + this._color;
    }
    set color(color) {
        this._color = color;
    }
    get doors() {
        return this._doors;
    }
    set doors(doors) {
        if ((doors % 2) === 0) {
            this._doors = doors;
        } else {
            throw new Error('Doors must be an even number');
        }
    }
    // Methods
    accelerate(speed: number): string {
        return `${this.worker()} is accelerating to ${speed} MPH.`
    }
    brake(): string {
        return `${this.worker()} is braking with the standard braking system.`
    }
    turn(direction: 'left' | 'right'): string {
        return `${this.worker()} is turning ${direction}`;
    }
    // This function performs work for the other method functions
    protected worker(): string {
        return this._make;
    }

}
let myCar1 = new Car('Cool Car Company', 'blue');

class ElectricCar extends Car {
    // Properties unique to ElectricCar
    private _range: number;
    // Constructor
    constructor(make: string, color: string, range: number, doors = 2) {
        super(make, color, doors);
        this._range = range;
    }
    // Accessors
    get range() {
        return this._range;
    }
    set range(range) {
        this._range = range;
    }
    // Methods
    charge() {
        console.log(this.worker() + " is charging.")
    }
    brake() {
    return `${this.worker()}  is braking with the regenerative braking system.`
}
}
let spark = new ElectricCar('Spark Motors','silver', 124, 2);
let eCar = new ElectricCar('Electric Car Co.', 'black', 263);
console.log(eCar.doors);
spark.charge();
console.log(spark.brake());