Add ngrx/store-devtools

gistfile1.txt

More infor here: https://github.com/ngrx/platform/blob/master/docs/store-devtools/README.md

Instructions can be found here:
https://github.com/ngrx/platform/blob/master/docs/store-devtools/README.md

1) install through npm:
npm install @ngrx/store-devtools --save

2) Download the Redux Devtools Extension:
https://github.com/zalmoxisus/redux-devtools-extension/

3) In 'app.module.ts' import the devtools module:
import { StoreDevtoolsModule } from '@ngrx/store-devtools';
import { environment } from '../environments/environment'; // Angular CLI environemnt

4) In 'app.module.ts' add this to NgModule:
@NgModule({
  imports: [
    StoreModule.forRoot(reducers),
    // Instrumentation must be imported after importing StoreModule (config is optional)
    StoreDevtoolsModule.instrument({
      maxAge: 25, // Retains last 25 states
      logOnly: environment.production, // Restrict extension to log-only mode
    }),
  ],
})

5) Click on the Redux DevTools (right upper corner of your browser) and see if the store works