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我的目标是延迟加载应用程序。我只想导入 NgModules 一次，在app.module.ts

例如user.component.ts需要FormsModule和HttpClientModule。我想导入 NgModulesapp.module.ts而不是components/user/user.module.ts

目前，如果user.component.ts需要FormsModuleand HttpClientModule，我需要将其导入user.module.ts. 理论上，我需要HttpClientModule为每View一个使用HttpClient.get(). 我担心这会增加lazy loaded component.

这是app.module.ts我想要实现的示例。

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';

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

===tl:dr下面是我使用的当前解决方案，并为使用的每个视图use user.module.ts导入HttpClientModuleHttpClient.get()

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';

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

应用程序路由.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

const routes: Routes = [
  {
    path: '',
    loadChildren: () => import('./components/user/user.module').then(m => m.UserModule)
  },
  {
    path: 'about/:id',
    loadChildren: () => import('./components/about/about.module').then(m => m.AboutModule),
  }
];

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

组件/用户/user.module.ts

import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';

import { UserRoutingModule } from './user-routing.module';
import { UserComponent } from './user.component';

@NgModule({
  imports: [
    UserRoutingModule,
    FormsModule,
    HttpClientModule
  ],
  declarations: [UserComponent]
})
export class UserModule { }
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