Angular 15 RouterOutlet: The Ultimate Routing Solution

I'm encountering an issue while trying to run my Angular project.

X [ERROR] NG8001: 'router-outlet' is not recognized: If 'router-outlet' is an Angular component, please ensure it is included in this module. If 'router-outlet' is a Web Component, add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. [plugin angular-compiler]

Below is the code in app.component.html:

<router-outlet></router-outlet>

And here is the content of app.component.ts:

import {Component, OnInit} from '@angular/core';
import {Router, RouterOutlet} from '@angular/router';
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrl: './app.component.css',
})
export class AppComponent implements OnInit{
  title = 'Docs';

  constructor(private _router: Router) {
  }
  ngOnInit() {
    this._router.navigate(['upload-pdf']).then(r=>console.log(r))
  }
}

Additionally, here is the information from app-routing.module.ts:

import { NgModule } from '@angular/core';
import {RouterModule, RouterOutlet, Routes} from '@angular/router';
import {AppComponent} from "./app.component";
import {PdfComponent} from "../pdf/pdf.component";
import {UploadPdfComponent} from "../upload-pdf/upload-pdf.component";

export const routes: Routes = [
  { path: '', component: AppComponent },
  { path: 'pdf', component: PdfComponent},
  { path: 'upload-pdf', component: UploadPdfComponent},
  { path: '**', component: AppComponent },
]

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

export class AppRoutingModule {
}

Further, here is the code from app.module.ts:

import {CUSTOM_ELEMENTS_SCHEMA, NgModule} from '@angular/core';
import { CommonModule } from '@angular/common';
import { AppRoutingModule } from './app-routing.module';
import {PdfComponent} from "../pdf/pdf.component";
import {UploadPdfComponent} from "../upload-pdf/upload-pdf.component";
import {FormsModule} from "@angular/forms";
import {MatFileUploadComponent, MatFileUploadModule, MatFileUploadQueueComponent} from "angular-material-fileupload";
import {RouterOutlet} from "@angular/router";
import {AppComponent} from "./app.component";

@NgModule({
  declarations: [
    AppComponent,
    PdfComponent,
    UploadPdfComponent,
    MatFileUploadComponent,
    MatFileUploadQueueComponent
  ],
  imports: [
    CommonModule,
    AppRoutingModule,
    FormsModule,
    MatFileUploadModule,
    RouterOutlet
  ],
  exports:[
    AppComponent
  ]
})
export class AppModule { }

Lastly, here is app.config.ts:

import { ApplicationConfig } from '@angular/core';
import { provideRouter } from '@angular/router';

import { routes } from './app-routing.module';

export const appConfig: ApplicationConfig = {
  providers: [provideRouter(routes)]
};

The error disappeared when the component was made standalone. Are there any other solutions to resolve this issue?

Answer №1

An error message has indicated that you must include the RouterModule in the AppComponent.

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

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

Furthermore, it is recommended to remove the imports of RouterOutlet from both the AppRoutingModule and AppModule as it is unnecessary.

However, for stand-alone components, you may import the RouterOutlet in the imports array.

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

@Component({
  selector: 'app-root',
  standalone: true,
  templateUrl: './app.component.html',
  styleUrl: './app.component.css',
  imports: [RouterOutlet]
})
export class AppComponent { }

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