Feathers is a database-agnostic Node.js application framework designed for building scalable backend systems. It functions as a real-time API framework that provides a server implementation for both REST endpoints and WebSocket connections.
The framework decouples application logic from the underlying database technology and communication protocols. This allows a single service to handle both HTTP and Socket requests while separating business logic from the specific data persistence layer.
The system organizes data operations through a standardized service-based interface and utilizes hook-based lifecycle interceptors to execute custom logic. It further supports event-driven synchronization to push data changes to connected clients instantly and employs a middleware-based request pipeline for handling authentication and validation.