angular建立一個預設帶路由的專案

1.建立專案命令

ng new angualrdemo08 --skip-install

2.建立需要的元件

ng g component home
ng g component news
ng g component newscontent

3.找到app-routing.module.ts配置路由

引入元件

import { HomeComponent } from './home/home.component';
import { NewsComponent } from './news/news.component';
import { NewscontentComponent } from './newscontent/newscontent.component';

配置路由

const routes: Routes = [
{path: 'home', component: HomeComponent},
{path: 'news', component: NewsComponent},
{path: 'newscontent/:id', component: NewscontentComponent},
{
path: '',
redirectTo: '/home',
pathMatch: 'full'
}
];

4. 找到 app.component.html 根元件模板 ，配置 router-outlet 顯示動態載入的路由

<h1>
<a routerLink="/home">首頁</a> <--點選會替換router-outlet標籤!-->
<a routerLink="/news">新聞</a>
</h1>
<router-outlet></router-outlet> <--可以簡單理解為：頁面的佔位符，動態載入，會被替換掉的。!-->

讓路由可用

引入 RouterModule，即把 RouterModule 新增到 AppModule 的imports 陣列中。

三、Angular routerLinkActive 設 置
routerLink 預設選中路由

<h1>
<a routerLink="/home" routerLinkActive="active">首頁</a>
<a routerLink="/news" routerLinkActive="active">新聞</a>
</h1>

<h1>
<a [routerLink]="[ '/home' ]"
 
 routerLinkActive="active">首頁</a>
<a [routerLink]="[ '/news' ]" routerLinkActive="active">新聞</a>
</h1>

四 、動態路由

1.配置動態路由

const routes: Routes = [
{path: 'home', component: HomeComponent},
{path: 'news', component: NewsComponent},
{path: 'newscontent/:id', component: NewscontentComponent},
{
path: '',
redirectTo: '/home',
pathMatch: 'full'
}
];

2. 跳轉傳值

<a [routerLink]="[ '/newscontent/',aid]">跳轉到詳情</a>
<a routerLink="/newscontent/{{aid}}">跳轉到詳情</a>

3. 獲取動態路由的值

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

constructor( private route: ActivatedRoute) {
}

ngOnInit() {
console.log(this.route.params);
this.route.params.subscribe(data=>this.id=data.id);
}

五 、 動態 路由的 js 跳轉

1.引入

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

2.初始化

export class HomeComponent implements OnInit {
constructor(private router: Router) {
}
ngOnInit() {
}
goNews(){
// this.router.navigate(['/news', hero.id]);
this.router.navigate(['/news']);
}
}

3. 路由跳轉

this.router.navigate(['/news', hero.id]);

六 、路由 get 傳值 js 跳轉

1. 引入 NavigationExtras

import { Router ,NavigationExtras} from '@angular/router';

2. 定義一個 goNewsContent 方法執行跳轉 ，用 用 NavigationExtras 配置傳參

goNewsContent(){
let navigationExtras: NavigationExtras = {
queryParams: { 'session_id': '123' },
fragment: 'anchor'
};
this.router.navigate(['/news'],navigationExtras);
}

3. 獲取 get 傳值

constructor(private route: ActivatedRoute) {
console.log(this.route.queryParams);
}

七 、父子路由

1. 建立元件引入元件

import { NewsaddComponent } from './components/newsadd/newsadd.component';
import { NewslistComponent } from './components/newslist/newslist.component';

2. 配置路由

{
path: 'news',
component:NewsComponent,
children: [
{
path:'newslist',
component:NewslistComponent
},
{
path:'newsadd',
component:NewsaddComponent
}
]
}

3. 父元件中定義 router-outlet

<router-outlet></router-outlet>