Offline-First Chat

Build a chat app that works seamlessly offline, queuing messages for delivery when online. Handle message ordering, conflict resolution, and sync indicators.

chatofflinesyncmessaging

Objectives

Full chat functionality that works without internet
Queue messages with pending/sent/delivered status
Resolve message ordering conflicts on sync
Show connection status and sync progress
Handle media messages with upload queuing

Hints

Use CRDTs or vector clocks for ordering
SQLite for local message storage
Implement exponential backoff for reconnection