Initial import of StoreModule & Devtools

app.module.ts

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

import { AppComponent } from './app.component';
import { TodoService } from './todo.service';

// ngrx
import { StoreModule } from '@ngrx/store';
import { StoreDevtoolsModule } from '@ngrx/store-devtools';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    FormsModule,
    StoreModule.forRoot({}),
    StoreDevtoolsModule.instrument({ maxAge: 25 })
  ],
  providers: [TodoService],
  bootstrap: [AppComponent]
})
export class AppModule { }