angular-docs-cn/public/docs/_examples/router/ts/app/admin/admin-dashboard.component.ts

// #docregion
import { Component, OnInit }    from '@angular/core';
import { ActivatedRoute }       from '@angular/router';
import { Observable }           from 'rxjs/Observable';
import { PreloadSelectedModules } from '../selective-preload-strategy';

import 'rxjs/add/operator/map';

@Component({
  template:  `
    <p>Dashboard</p>

    <p>Session ID: {{ sessionId | async }}</p>
    <a id="anchor"></a>
    <p>Token: {{ token | async }}</p>

    Preloaded Modules
    <ul>
      <li *ngFor="let module of modules">{{ module }}</li>
    </ul>
  `
})
export class AdminDashboardComponent implements OnInit {
  sessionId: Observable<string>;
  token: Observable<string>;
  modules: string[];

  constructor(
    private route: ActivatedRoute,
    private preloadStrategy: PreloadSelectedModules
  ) {
    this.modules = preloadStrategy.preloadedModules;
  }

  ngOnInit() {
    // Capture the session ID if available
    this.sessionId = this.route
      .queryParams
      .map(params => params['session_id'] || 'None');

    // Capture the fragment if available
    this.token = this.route
      .fragment
      .map(fragment => fragment || 'None');
  }
}