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Sending messages

Messages are delivered in real-time via Socket.IO WebSockets. When you send a message, all users currently in the room receive it instantly — no polling, no delays.

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Typing indicators

Fleet shows a typing indicator when other users are composing a message. The indicator appears below the message list and displays the usernames of everyone currently typing. Typing state is automatically cleared when:
  • A message is sent
  • The user stops typing for a few seconds

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Message storage

Messages are held in memory only — they are never written to disk or a database. This means:
  • Messages are only available for the lifetime of the server process
  • If the server restarts, all rooms and messages are lost
  • When a room expires, its messages are gone permanently
This is intentional. Fleet is designed for conversations that don’t need to persist.

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System messages

The room displays system events inline with chat messages:
  • alice joined — when a user enters the room
  • alice left — when a user disconnects