bar.ts

import { Service } from 'typedi'

@Service()
export class ExampleInjectedService {
    printMessage() {
        console.log('I am alive!')
    }
}

baz.ts

import 'reflect-metadata'
import { Service } from 'typedi'
import { ExampleInjectedService } from './bar';
import * as _ from 'lodash'

@Service()
export default class ExampleService {
    constructor(
        public injectedService: ExampleInjectedService
    ) {}

    public test() {
        console.log(this.injectedService)
        this.injectedService.printMessage()
    }

    public test2(compareService: ExampleInjectedService) {
        console.log(_.isEqual(compareService, this.injectedService))
    }

    public getService() {
        return this.injectedService
    }
}

foo.ts

import ExampleService from './baz'
import { Container } from 'typedi'



const serviceInstance = Container.get(ExampleService);
let svc = serviceInstance.getService();

const serviceInstance2 = Container.get(ExampleService);
serviceInstance2.test2(svc);

const serviceInstance3 = Container.get(ExampleService);
serviceInstance3.test2(svc);

serviceInstance.injectedService.printMessage()

tsconfig.json

{
  "compilerOptions": {
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "lib": [
      "dom",
      "es5",
      "scripthost",
      "es2015.symbol"
    ]
  }
}