dummy-di.ts

class DIContainer {
  diMap: {
    [key: string]: any
  }

  initialDiMap: {
    [key: string]: any;
  }

  add(_class) {
    this.initialDiMap[_class.name] = _class;
  }

  get(className) {
    return this.diMap[className];
  }

  bootstrap() {
    for (let className in this.diMap) {
      this.diMap[className] = new this.initialDiMap[className];
    }
  }
}

interface Engine {
  label: string;
}

class OilEngine implements Engine {
  public label: string;

  constrcutor() {
    this.label = 'V8';
  }
}

class ElectricEngine implements Engine {
  public label: string;

  constrcutor() {
    this.label = 'Tesla';
  }
}

class SunEngine {
  
}

interface CarBody {
  type: string;
}

class SedanBody implements CarBody {
  public type: string;

  constructor() {
    this.type = 'Sedan';
  }
}

class Car {
  public engine: Engine;
  public body: CarBody;

  static inject = ['ElectricEngine', 'SedanBody'];

  constructor(engine: Engine, body: CarBody) {
    this.engine = engine || null;
    this.body = body || null;
  }
}

class App {
  constructor() {
    const di = new DIContainer();
    di.add(ElectricEngine);
    di.add(SedanBody);
    di.bootstrap();

    const electricCar = new Car(di.get(Car.inject[0]), di.get(Car.inject[1]))
  }
}