Angular src/app/app.module.ts:38:5中出错-错误TS2304:找不到名称'；HttpClientModule'；

我将Angular-8用于一个特定项目

这是我的app.module.ts

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { LoginModule } from './login/login.module';
import { CoreModule } from './core/core.module';
import { SharedModule } from './shared/shared.module';
import { ReactiveFormsModule } from '@angular/forms';
import { HTTP_INTERCEPTORS } from '@angular/common/http';
import { ErrorsModule } from './errors/errors.module';
import { RouterModule } from '@angular/router';
import { PagesModule } from './pages/pages.module';
import { FormsModule } from '@angular/forms';
import { SidebarComponent } from './shared/sidebar/sidebar.component';
import { StoreModule } from '@ngrx/store';
import { reducers, metaReducers } from './store/reducers';
import { StoreDevtoolsModule } from '@ngrx/store-devtools';
import { environment } from '../environments/environment';
import { EffectsModule } from '@ngrx/effects';
import { AppEffects } from './store/effects/app.effects';
import { JwtInterceptor } from './core/interceptors/jwt.interceptor';
import { ErrorInterceptor } from './core/interceptors/error.interceptor';
import { CacheInterceptor } from './core/interceptors/cache.interceptor';
import { ServiceWorkerModule } from '@angular/service-worker';
import { HttpClientTestingModule } from '@angular/common/http/testing';
import {HttpClientModule} from '@angular/common/http';

@NgModule({
 imports: [
  RouterModule,
  BrowserModule,
  BrowserAnimationsModule,
  LoginModule,
  CoreModule,
  SharedModule,
  ReactiveFormsModule,
  HttpClientModule,
  ErrorsModule,
  PagesModule,
  FormsModule,
  AppRoutingModule,
  StoreModule.forRoot(reducers, {
    metaReducers,
    runtimeChecks: {
      strictStateImmutability: true,
      strictActionImmutability: true
    }
  }),
  !environment.production ? StoreDevtoolsModule.instrument() : [],
  EffectsModule.forRoot([AppEffects]),
  StoreDevtoolsModule.instrument({
    maxAge: 25,
    logOnly: environment.production
  }),
  ServiceWorkerModule.register('ngsw-worker.js', {
    enabled: environment.production
  })
],

当我发球时，我犯了一个错误：

src/app/app.module.ts:38:5中出错-错误TS2304:找不到名称“HttpClientModule”

这是第38行：

HttpClientModule

我如何解决这个问题

---

感谢在Angular 4.3.0版本中引入HttpClient。此外，您还必须确保在主AppModule的导入元数据中导入并注入了HttpClientModule

//从AppModule中的@angular/common/http导入HttpClientModule
从'@angular/common/http'导入{HttpClientModule}；
//在您想要使用“HttpClient”的地方`
从'@angular/common/http'导入{HttpClient}