Typescript Dependency Injection

typescript-dependency-injection.ts

interface Wheel {}
interface Engine {}

class Car {
    private wheel: Wheel;
    private engine: Engine;

    public constructor(wheel: Wheel, engine: Engine) {
        this.wheel = wheel;
        this.engine = engine;
    }
}

class AdvancedWheel implements Wheel {
    // ...
}
class AdvancedEngine implements Engine {
    // ...
}

class EconomicWheel implements Wheel {
    // ...
}
class EconomicEngine implements Engine {
    // ...
}

// Client
let advWheel = new AdvancedWheel();
let advEngine = new AdvancedEngine();
let advancedCar = new Car(advWheel, advEngine);

let ecoWheel = new EconomicWheel();
let ecoEngine = new EconomicEngine();
let economicCar = new Car(ecoWheel, ecoEngine);

very simple and useful, thank you

excellent