Any workaround for Firebase Firestore persistence in Expo?

Hi!!

I am facing a problem in expo and react native using Firesbase Firestore. I am trying to persist it but I get the error

Error enabling offline storage. Falling back to storage disabled: FirebaseError: [code=unimplemented]: This platform is either missing IndexedDB or is known to have an incomplete implementation. Offline persistence has been disabled.

Is there any way to persist it? Or not possible?

 (async () => {
      try {
        // Try to enable the firebase auth persistence
        await firebase.enableAuthPersistence(); <------------------ Works good!
      } catch (err) {
        console.log(err);
      }

      // Try to enable the firestore persistence
      try {
        await firebase.enableFirestorePersistence(); <------------- Not working
      } catch (err) {
        console.log(err);
      }
    })().then(() => {
      // Listen the user's auth state
      unsubscribe = firebase.auth.onAuthStateChanged((authUser) => {

Note: This code is implemented in a Splash Screen. I only show the login form after running it.

Also, here is the code for my firebase class (context provider)

export default class Firebase {
  constructor() {
    if (!firebase.apps.length) {
      // Initialize App
      firebase.initializeApp(Constants.manifest.web.config.firebase);

      // Initialize firebase services
      this.auth = firebase.auth();
      this.db = firebase.firestore();
      this.storage = firebase.storage();
      this.functions = firebase.functions();
    }
  }

  enableAuthPersistence = () =>
    this.auth.setPersistence(firebase.auth.Auth.Persistence.LOCAL);

  enableFirestorePersistence = () => this.db.enablePersistence();

   ...

}

Tested in Samsung galaxy s8+ and iPhone 11.

"react-native": "^0.63.3",
"expo": "39.0.0",
"firebase": "7.9.0",
"firebase-tools": "^8.4.3",

[suzigit]

I was using Firebase/firestore and “expo-firestore-offline-persistence” to save and read saved objects. I upgraded to Expo SDK42 and now I have this exception. FirebaseError: You are using the memory-only build of Firestore. Persistence support is only available via the @firebase/firestore bundle or the firebase-firestore.js build.

I noticed that expo-firestore-offline-persistence is not maintained anymore. Is it possible to deal with that without going to native code?

[byCedric]

Hi @VictorioMolina, it’s a “known issue” that the standard Firebase JS SDK isn’t fully working in a React Native or Expo environment. It needs more context that’s only possible through native code, that’s why we have multiple Expo Firebare packages to help in that. I would suggest taking a look at the “using firebase” docs and try using the expo-firebase* packages instead. If that doesn’t work for you, please let us know! You can create a new issue for the stuff you encounter.

Hope this helps!