import {Injectable} from '@angular/core';
import * as Rx from 'rxjs';

@Injectable()
export class TransmitRouteService {

  data = new Rx.Subject();

  constructor() {
    /* I tried this just to see if it would sync I/O. */
    /* It did not.                                    */
    // this.data.next('aaa');
  }


  insertData(data){
    this.data.next(data);
  }
}

@NgModule({
  declarations: [
    AppComponent,
    Menu1,
    Menu2,
    Menu3,
    Menu4,
    Menu5,
    Menu6,
  ],
  imports: [
    BrowserAnimationsModule,
    BrowserModule,
    AppRouting
  ],
  exports: [],
  providers: [TransmitRouteService],
  bootstrap: [AppComponent]
})
export class AppModule {
}

import {Component, OnInit} from '@angular/core';
import {Router} from '@angular/router';
import { slideLeft, slideRight } from '../../../../assets/animations/router.animations';
import {TransmitRouteService} from "../../../../assets/services/transmit.route.service";


@Component({
  selector: 'app-routing',
  templateUrl: './routing.component.html',
  styleUrls: ['./routing.component.scss'],
  animations: [slideLeft, slideRight],
  host: { '[@slideLeft, slideRight]': '' }
})
export class RoutingComponent implements OnInit {

  router:any;

  constructor(private _router: Router, private _transmitRouteService: TransmitRouteService) {
    this.router = _router;
  }

  ngOnInit() {
  }

  getState(outlet) {
    this._transmitRouteService.insertData(this.router.url);
    return outlet.activatedRouteData.state;
  }

}

import { Component, OnInit } from '@angular/core';
import {TransmitRouteService} from '../../../assets/services/transmit.route.service';

@Component({
  selector: 'app-top-bar',
  templateUrl: './top-bar.component.html',
  styleUrls: ['./top-bar.component.scss'],
})
export class TopBarComponent implements OnInit {

  route: string = '';

  constructor(private _transmitRouteService: TransmitRouteService) { }

  ngOnInit() {
    this._transmitRouteService.data.subscribe((value) => {
      this.route = value.toString();
    }, (error) => {
      console.log(error);
    }, () => {
      console.log('done !');
    });
  }

}

Input: Output:
Hello
World   Hello
I       World
Am      I
Tatsu   Am