Undo Is a Stack of Your Own Mistakes
Ctrl+Z is trivial in a single user app. Add one collaborator and the obvious implementation starts erasing other people's work.
#crdt
4 posts
The Server Forgets Everything and That's Fine
Rooms live in memory and get thrown away. The client is the persistence layer, which changes what reconnecting means.
Writing a Binary WebSocket Protocol by Hand
What actually goes over the wire in a collaborative canvas, and why the ready made library didn't fit.
Real-Time Collaboration Is Not Just Sending Updates
Two people editing the same canvas is not a networking problem. It's an agreement problem.