angualr4動態設置頁面標題

1.路由配置

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import {ConfirmOrderComponent} from "./confirm-order/confirm-order.component";

const routes: Routes = [
  {
    path: '',
    redirectTo: 'confirm-order',
    pathMatch: 'full',
  },
  {
    path: 'confirm-order',
    component: ConfirmOrderComponent,
    data: {title: '確認訂單'}
  }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

2.AppComponent訂閱路由變化，動態設置頁面標題

import { Component, OnInit } from '@angular/core';
import {Router, ActivatedRoute, NavigationEnd} from "@angular/router";
import {Title} from "@angular/platform-browser";

import 'rxjs/add/operator/filter';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/mergeMap';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {

  constructor(
    private router: Router,
    private activatedRoute: ActivatedRoute,
    private titleService: Title
  ) {}

  ngOnInit(): void {
    this.router.events
      .filter(e => e instanceof NavigationEnd)
      .map(() => this.activatedRoute)
      .map(r => {
        while (r.firstChild) r = r.firstChild;
        return r;
      })
      .filter(r => r.outlet === 'primary')
      .mergeMap(r => r.data)
      .subscribe(e => this.titleService.setTitle(e['title']));
  }

}