TypeScript

React Native Firebase ships TypeScript declarations for every module. From v25 onward, modular types and helpers are exported from each package root (for example @react-native-firebase/auth) alongside the namespaced default export.

If you are setting up TypeScript in a new React Native app, see the official TypeScript documentation.

Import modular helpers and types from the package root:

import { useEffect, useState } from 'react';
import { getAuth, onAuthStateChanged, type User } from '@react-native-firebase/auth';

function App() {
  const [user, setUser] = useState<User | null>(null);

  useEffect(() => {
    const authInstance = getAuth();
    return onAuthStateChanged(authInstance, setUser);
  }, []);

  if (!user) {
    return null;
  }

  return user.email;
}

See Migrating to v25 for Auth breaking changes (FirebaseAuthTypes deprecation, provider helpers, async isSignInWithEmailLink, and other firebase-js-sdk alignment updates).

Published types are built to packages/<module>/dist/typescript/ (for example packages/auth/dist/typescript/lib/index.d.ts). Source lives under packages/<module>/lib/ as TypeScript (.ts) since the v25 package migrations.

Modular Auth source: packages/auth/lib/modular.ts.

Public API reference (generated from source JSDoc): reference API.

Each package exports its own types from the package root. Examples:

For Auth v25 alignment details and intentional firebase-js-sdk differences, see the Auth compare:types triage knowledge document and yarn compare:types auth registry.