Real-time Collaboration App (Google Docs Clone)

Summary

A shared, live-editing document app — the most advanced project on this list, requiring real-time sync, conflict resolution and multi-cursor presence.

• 1Start with a simpler version — shared state syncing (e.g. a shared canvas or list) before rich text.
• 2Learn the basic ideas behind CRDTs or operational transforms for conflict-free sync.
• 3Show multiple users' cursors and presence to make the collaboration feel real.