'router-outlet' 在执行 ng build --prod 时不是已知元素

如何解决'router-outlet' 在执行 ng build --prod 时不是已知元素

我在执行 ng build --prod 时遇到以下错误。它在 ng build 中运行良好。

Error: src/app/app.component.html:1:1 - error NG8001: 'router-outlet' is not a kNown element:
1. If 'router-outlet' is an Angular component,then verify that it is part of this module.
2. If 'router-outlet' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.
1 <router-outlet></router-outlet>
  ~~~~~~~~~~~~~~~

  src/app/app.component.ts:5:16
    5   templateUrl: './app.component.html',~~~~~~~~~~~~~~~~~~~~~~
    Error occurs in the template of component AppComponent.

我在 app.module.ts 文件中使用 RouterModule

import { browserModule } from '@angular/platform-browser';
import { HttpClientModule } from  '@angular/common/http';
import { NgModule,CUSTOM_ELEMENTS_SCHEMA,NO_ERRORS_SCHEMA  } from '@angular/core';
import { Routes } from '@angular/router';
import { AppRoutingModule } from './app-routing.module';

import { AppComponent } from './app.component';
import { DashboardComponent } from './dashboard/dashboard.component';
import {NgbDropdown,NgbModule} from '@ng-bootstrap/ng-bootstrap';
import { FilterPipe } from './dashboard/filter.pipe';

import {TimeAgoPipe} from 'time-ago-pipe';
import { LastseenDevicesComponent } from './modal/lastseen-devices/lastseen-devices.component';
import { browserAnimationsModule } from '@angular/platform-browser/animations';


@NgModule({
  declarations: [
    AppComponent,DashboardComponent,TimeAgoPipe,FilterPipe,],imports: [
    HttpClientModule,FormsModule,NgbModule,AppRoutingModule,browserModule,browserAnimationsModule,HttpClientModule,ReactiveFormsModule,bootstrap: [ AppComponent ],providers: [ NgbDropdown],//schemas: [ CUSTOM_ELEMENTS_SCHEMA,NO_ERRORS_SCHEMA]
  //providers: [ NgbDropdown,DataService,UtilService]
})
export class AppModule { }

app-routing.module.ts 文件

import { NgModule } from '@angular/core';
import { Routes,RouterModule } from '@angular/router';
import { DashboardComponent } from './dashboard/dashboard.component';
 
const routes: Routes = [
 
 {
 path: '',pathMatch: 'full',component: DashboardComponent,},];
 
@NgModule({
  imports: [RouterModule.forRoot(routes)],exports: [RouterModule],})
export class AppRoutingModule { }

这是 main.ts 个文件

import 'hammerjs';
import { enableProdMode } from '@angular/core';
import { platformbrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

if (environment.production) {
  enableProdMode();
}
platformbrowserDynamic().bootstrapModule(AppModule).then(ref => {
  if (window['ngRef']) {
    window['ngRef'].destroy();
  }
  window['ngRef'] = ref;
}).catch(err => console.error(err));

app.component.ts 文件

import { Component,NgModule } from '@angular/core';

@Component({
  selector: 'app-root',templateUrl: './app.component.html',styleUrls: ['./app.component.css'],})

export class AppComponent {
  title = 'Project1';
}

app.component.html 文件只有 <router-outlet></router-outlet>。 Environment 文件夹有两个文件 environment.prod.ts 和 environment.ts 文件。

Angular.json 文件

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json","version": 1,"newProjectRoot": "projects","projects": {
    "AirwatchProject1": {
      "projectType": "application","schematics": {},"root": "","sourceRoot": "src","prefix": "app","architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser","options": {
            "outputPath": "dist/Project1","index": "src/index.html","main": "src/main.ts","polyfills": "src/polyfills.ts","tsConfig": "tsconfig.app.json","aot": false,"assets": [
              "src/favicon.ico","src/assets"
            ],"styles": [
              "./node_modules/@angular/material/prebuilt-themes/indigo-pink.css","node_modules/bootstrap/dist/css/bootstrap.min.css","src/styles.css"
            ]          
          },"configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts","with": "src/environments/environment.prod.ts"
                }
              ],"optimization": true,"outputHashing": "all","sourceMap": false,"extractCss": true,"namedChunks": false,"aot": true,"extractLicenses": true,"vendorChunk": false,"buildOptimizer": true,"budgets": [
                {
                  "type": "initial","maximumWarning": "2mb","maximumError": "5mb"
                },{
                  "type": "anyComponentStyle","maximumWarning": "6kb","maximumError": "10kb"
                }
              ]
            }
          }
        },"serve": {
          "builder": "@angular-devkit/build-angular:dev-server","disableHostCheck": true,"options": {
            "browserTarget": "Project1:build"
          },"configurations": {
            "production": {
              "browserTarget": "Project1:build:production"
            }
          }
        },"extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n","options": {
            "browserTarget": "Project1:build"
          }
        },"test": {
          "builder": "@angular-devkit/build-angular:karma","options": {
            "main": "src/test.ts","tsConfig": "tsconfig.spec.json","karmaConfig": "karma.conf.js","../node_modules/bootstrap/dist/css/bootstrap.min.css","src/styles.css"
            ],"scripts": [
              "node_modules/jquery/dist/jquery.min.js","node_modules/bootstrap/dist/js/bootstrap.bundle.min.js","/node_modules/popper.js/dist/umd/popper.min.js"
            ]
          }
        },"lint": {
          "builder": "@angular-devkit/build-angular:tslint","options": {
            "tsConfig": [
              "tsconfig.app.json","tsconfig.spec.json","e2e/tsconfig.json","tsconfig.worker.json"
            ],"exclude": [
              "**/node_modules/**"
            ]
          }
        },"e2e": {
          "builder": "@angular-devkit/build-angular:protractor","options": {
            "protractorConfig": "e2e/protractor.conf.js","devServerTarget": "Project1:serve"
          },"configurations": {
            "production": {
              "devServerTarget": "Project1:serve:production"
            }
          }
        }
      }
    }
  },"defaultProject": "Project1","cli": {
    "analytics": "80627-93f7438a70dd"
  }
}

我该如何解决这个问题？

Angular CLI：10.0.5 节点：12.18.3

解决方法

您的 AppRoutingModule 应该已经导入和导出 RouterModule。因此，您应该从 RouterModule 导入中删除 AppModule。

我假设您的 AppRoutingModule 看起来像这样：

const appRoutes: Route[] = [...]

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

顺便说一句，我也非常不鼓励使用 NO_ERRORS_SCHEMA

,

在声明出错的组件的模块中导入 RouterModule。对于 HTML 中与例程相关的任何内容，请导入 RouterModule