Angular でのルーティングとその使用法の詳細な説明

ng g component components/home
ng g component components/news
ng g component components/newscontent

import { HomeComponent } from './components/home/home.component';
import { NewsComponent } from './components/news/news.component';
import { ProductComponent } from './components/product/product.component';

const routes: Routes = [
{path: 'home', component: HomeComponent},
{path: 'news', component: NewsComponent},
{path:'product', component:ProductComponent },
{path: '*', redirectTo: '/home', pathMatch: 'full' }
];

<h1>
    <a>首页</a>
    <a>新闻</a>
</h1>
<router-outlet></router-outlet>

<a>首页</a>
<a>新闻</a>

//匹配不到路由的时候加载的组件 或者跳转的路由
{
    path: '**', /*任意的路由*/
    // component:HomeComponent
    redirectTo:'home'
}

<h1>
  <a>
    首页
  </a>
  <a>
    新闻
  </a>
</h1>

<h1>
    <a>首页</a>
    <a>新闻</a>
</h1>

import { Router } from '@angular/router';
.
constructor(private router: Router) {}
.
this.router.navigate(['/newscontent'],{
  queryParams:{
    name:'laney',
    id:id
  },
  skipLocationChange: true 
  //可以不写，默认为false,设为true时路由跳转浏览器中的url会保持不变，传入的参数依然有效
});

import { ActivatedRoute } from '@angular/router';

constructor(public route:ActivatedRoute) { }
ngOnInit() { 
    this.route.queryParams.subscribe((data)=>{
      console.log(data);
 })
}

<a [routerLink]="[’/list-item’, item.id]"> {{ item.name }}
//js跳转 //router为ActivatedRoute的实例
this.router.navigate([’/list-item’, item.id]);

{path: ‘list-item/:id’, component: ListItemComponent}

this.route.params.subscribe(
  param => {
      this.id= param['id'];
  }
)

import { WelcomeComponent } from ‘./components/home/welcome/welcome.component’;
 import { SettingComponent } from ‘./components/home/setting/setting.component’;

{
    path:'home',
    component:HomeComponent,
    children:[{
      path:'welcome',
      component:WelcomeComponent
    },{
      path:'setting',
      component:SettingComponent
    },
    {path: '**', redirectTo: 'welcome'}
  ]
},