There are two ways to define dependencies which you would like injected into your objects in Aurelia:

1. Use the `inject` decorator
2. Use the static `inject` member

Using the static inject member has the benefit of not needing to import `inject` from the aurelia-framework:

import {Todo} from './todo';
import {Factory} from 'aurelia-dependency-injection';
import {EventAggregator} from 'aurelia-event-aggregator';

export class App {
  static inject = [EventAggregator, Factory.of(Todo)];
  constructor(aggregator, todoFactory) {
    this.bus = aggregator;
    this.completedTodos = 0;
    this.newTodoDesc = '';
    this.todos = [];
    this.todoFactory = todoFactory;
  }
}