angularfiremodule documentation code example

Example 1: ngular fire

ng add @angular/fire

Example 2: angular firebase

import { AngularFirestore } from '@angular/fire/firestore';

@Component(...)
export class SomeComponent {

  constructor(private db: AngularFirestore) {
      const things = db.collection('things').valueChanges();
      things.subscribe(console.log);
  }
}