下面是我在组件中所做的工作：

import { Component, OnDestroy, OnInit } from '@angular/core';
import { interval, Subscription } from 'rxjs';

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.css'],
})
export class HomeComponent implements OnInit, OnDestroy {
  constructor(private firstObsSubscription: Subscription) {}

  ngOnInit() {
    interval(1000).subscribe((count) => console.log(count));
  }

  ngOnDestroy() {
    this.firstObsSubscription.unsubscribe();
  }
}

组件然后被捆绑到模块中，模块随后被注入到另一个模块中。

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

import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { UserComponent } from './user/user.component';
import { AppRoutingModule } from './app-routing.module';

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

很明显，我做错了什么