Angular 在使用单击的对象进行布线后，返回上一个组件的步骤

我有三个组件

标题

，

列表

和

主页

在

标题

中，

列表

组件的路由路径如下所示：

  <div>
    <a [routerLink]="['../list']" >List</a>
  </div>

应用程序路由.module.ts

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router'; 
import { ListComponent } from './list/list.component';
import { HomeComponent } from './home/home.component';
const routes: Routes = [
    { path: '', component: ListComponent },
    { path: 'list', component: ListComponent },  
    { path: 'home/:id', component: HomeComponent },  
];

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

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router'

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.css']
})
export class HomeComponent implements OnInit {
  public id: string;
   public sub: any = {};
  constructor(public route: ActivatedRoute) { }

  ngOnInit() {
     this.sub = this.route.params.subscribe(params => {
        this.id = params['id'];
        });
        console.log(this.id);
  }

}

home.ts

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router'; 
import { ListComponent } from './list/list.component';
import { HomeComponent } from './home/home.component';
const routes: Routes = [
    { path: '', component: ListComponent },
    { path: 'list', component: ListComponent },  
    { path: 'home/:id', component: HomeComponent },  
];

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

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router'

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.css']
})
export class HomeComponent implements OnInit {
  public id: string;
   public sub: any = {};
  constructor(public route: ActivatedRoute) { }

  ngOnInit() {
     this.sub = this.route.params.subscribe(params => {
        this.id = params['id'];
        });
        console.log(this.id);
  }

}

home.html

<app-header></app-header>
<h2>List Component</h2>
<div *ngFor="let contact of contacts" >

 <mat-card [routerLink]="['../home' , contact.id]"  >
    <h4>{{contact.contactName}}</h4>
     <p>{{contact.email}}</p>
</mat-card>
</div>

<app-header></app-header>
<h2>Home Component</h2>
Clicked ID ==> {{id}}

通过添加：

{ path: 'list', component: ListComponent }

因此，您的路线将如下所示：

const routes: Routes = [
  { path: '', component: ListComponent }, -- for default page
  { path: 'list', component: ListComponent },  
  { path: 'home/:id', component: HomeComponent },  
];

和HTML代码：

<div>
    <a [routerLink]="['/list']">List</a>
</div>


根据您的要求使用
路由器插座
，并在app.component.html中移动
应用标题
。