Presence and Live Data Updates

In real-time applications, presence refers to tracking who is currently online, active, or viewing a specific resource.

• Think of a chat application showing 'online' status.
• Or a collaborative document editor indicating who else is viewing or editing.
• It's crucial for dynamic, interactive user interfaces.

Phoenix Framework provides a powerful, built-in module called Phoenix.Presence to manage presence information.

• It leverages Elixir's concurrency and distribution features.
• It automatically handles users joining, leaving, and even network disconnections.
• This makes building robust presence features much simpler.