Angular-6路由器出口不是已知元素，模板解析错误

Question

APP-routing.module.ts

 import {NgModule} from '@angular/core'; import {RouterModule, Routes} from '@angular/router'; import {PostListComponent} from './post/post-list.component'; const routes: Routes = [ { path: '', redirectTo: '/home', pathMatch: 'full' }, { path: 'posts', component: PostListComponent}, ] @NgModule({ imports: [ RouterModule.forRoot(routes)], exports: [ RouterModule ] }) export class AppRoutingModule{ } **app.component.html** 

 <a routerLink='/posts'>View Posts</a> <div style="text-align:center"> <h1> Welcome to {{ title }}! </h1> </div> <router-outlet></router-outlet> 

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Answer 1

我知道我没有在App.module.ts中导入App-routing.module

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppRoutingModule } from './app-routing.module';
import { HttpClientModule } from '@angular/common/http';
import { AppComponent } from './app.component';
import { PostListComponent } from './post/post-list.component';
import { PostService} from './post/post.service';
import { HomepageComponent } from './homepage/homepage.component';

@NgModule({
  declarations: [
    AppComponent,
    PostListComponent,
    HomepageComponent
  ],
  imports:[
    BrowserModule,
    HttpClientModule,
    **AppRoutingModule**
  ],
  providers: [
    PostService
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }