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Provide Injectables

Components​

A component is a class decorated with @Component.

@Component()
@Scope(ComponentScope.SINGLETON)
class Timer {
  startTime = Date.now()

  getElapsed() {
      return Date.now() - this.startTime;
  }
}
const MyModule = createModule({
  components: [Timer]
});

Provide Constant Injectables​

The following example archives almost the same goal by providing Timer as a constant, except that the instance of Timer will be created immediately when the source file is loaded. Also, note that constant injectables are always in SINGLETON scope.

const TimerModule = createModule({
    constants: [{
        provide: Timer,
        value: new Timer()
    }]
});

Provide Injectable through Factory​

When you need factory pattern, you can also provide injectables in this way:

class TimerFactory extends ComponentFactory<Timer> {
    build() {
        return new Timer();
    }
}


const TimerModule = createModule({
    factories: [{
        provide: Timer,
        scope: ComponentScope.SINGLETON,
        factory: TimerFactory
    }]
});