RxFire

RxFire is an open-source JavaScript library that provides RxJS observable bindings for various Firebase web client SDKs, including Firestore, Realtime Database, Cloud Storage, Authentication, and Functions. Currently at version 6.1.0, it targets Firebase JS SDK v9+ modular APIs and is compatible with RxJS v6 and v7. The library offers observable creators that simplify asynchronous data streams from Firebase, making it portable across frameworks and tree-shakeable. Key differentiators include the ability to easily combine multiple Firebase data sources using RxJS operators and simplify code-splitting of Firebase features, acting as a complementary tool rather than a full wrapper for the Firebase SDK. It is under active maintenance by the Firebase Extended team.