Realtime Presence

Synchronize shared state between users through websockets.

Supabase's Realtime Presence feature allows you to track and synchronize shared state between connected users in real-time. This capability enables you to build collaborative applications where users can see each other's status, actions, or any custom state information instantly.

Key features

  1. Real-time state synchronization: Track and update shared state across multiple clients.
  2. Event-based tracking: Listen to 'sync', 'join', and 'leave' events for state changes.
  3. Custom state definition: Share any type of state information between users.
  4. Unique client identification: Use auto-generated or custom keys to identify clients.
  5. Channel-based organization: Group users and their states into specific channels or rooms.
  6. Easy state management: Track, untrack, and update state with simple method calls.

Benefits:

  • Real-time user tracking: Monitor which users are currently active or online.
  • Enhanced interactivity: Create more engaging, collaborative user experiences.
  • Reduced complexity: Implement shared state features without building custom synchronization logic.
  • Flexible use cases: Adapt the feature for various applications, from simple online indicators to complex collaborative tools.

Realtime Presence is particularly valuable for:

  • Collaborative document editing platforms
  • Multiplayer games showing player positions or status
  • Team collaboration tools with user availability indicators
  • Live streaming platforms displaying viewer counts and engagement
  • Project management applications with real-time task assignments
  • Social media platforms showing active users in a group or chat

Supabase's Realtime Presence feature provides a powerful tool for creating interactive, real-time applications that require shared state management, allowing developers to focus on creating unique and valuable user experiences.

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