How can I translate text input in AngularFire2 Firestore use ngx-translate?

Question

<div class="row"><h6>{{item.ageList}}</h6></div>
<div class="row"><h6>{{item.amenities}}</h6></div>

Note: I wanna translate data after getting of Firestore such as

<div class="row"><h6>{{'item.ageList' | translate}}</h6></div>
<div class="row"><h6>{{'item.amenities' | translate}}</h6></div>

Firestore object image

Answer 1

In ngx-translate's repo you do have Firebase's example.
https://github.com/ngx-translate/core/blob/master/FIREBASE_EXAMPLE.md

EDIT. After put some work I can give you working example.
1. Put your firebase's config into envrionment.ts

export const environment = {
  production: false,
  firebase: {
    apiKey: '',
    authDomain: '',
    databaseURL: '',
    projectId: '',
    storageBucket: '',
    messagingSenderId: ''
  },
};

You can get it from Firebase Console of your project.
2. Create firestore-trans-loader.ts in shared directory, next to app directory

import { TranslateLoader } from '@ngx-translate/core';
import { AngularFirestore } from '@angular/fire/firestore';
import { Observable } from 'rxjs';

export class FirestoreTransLoader implements TranslateLoader {

  constructor(private db: AngularFirestore) {
  }

  getTranslation(lang: string, prefix: string = 'translates'): Observable<any> {
    return this.db.doc(`${prefix}/${lang}`).valueChanges();
  }

}

3. Prepare your app.module.ts .

export function FirestoreTranslationsLoaderFactory(db: AngularFirestore) {
  return new FirestoreTransLoader(db);
}

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AngularFireModule.initializeApp(environment.firebase),
    AngularFirestoreModule,
    TranslateModule.forRoot({
      loader: {provide: TranslateLoader, useFactory: FirestoreTranslationsLoaderFactory, deps: [AngularFirestore]}
    })
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

4. And finally use it in your component

import { Component } from '@angular/core';
import { TranslateService } from '@ngx-translate/core';

@Component({
  selector: 'app-root',
  template: `
    <p>{{ helloKey | translate }}</p>
    <select (change)="onLangChange($event)">
      <option value="en">English</option>
      <option value="pl">Polish</option>
    </select>

  `,
})
export class AppComponent {

  helloKey = 'HELLO';
  constructor(private translate: TranslateService) {
    translate.setDefaultLang('en');
    translate.use('en');
  }

  onLangChange(event) {
    this.translate.use(event.target.value);
  }

}

Here you do have complete repo without config where you can find out details (if I forgot about something).
https://github.com/Mr-Eluzive/angularfire-ngx-translate-example Also I have put some work into this so maybe I will try to push it into ngx-translate repo.