> In fact, the complexity of Chat Messages and Notifications synchronisation is one of the prime reasons why React exists.

Which makes it even more ironic that in the 10 years since React was announced in 2013 and when I quit Facebook, they never managed to fix the original state synchronization bug that they demonstrated in the original React announcement for more than a few months at a time at best.

I'm sure technically it wasn't a singular bug over the years and the causes were complex, but React did fuck all in relation to the unread message counter being correct.

> In fact, the complexity of Chat Messages and Notifications synchronisation is one of the prime reasons why React exists.

SSE is perfect for chat/notifications and is a lot simpler than syncing. The server pushes updates to the client doesn't require a sync. SSE is also more performant since it can keep the connection open. The example below is on a $10 vps last I heard.

https://data-star.dev/examples/dbmon

right, so use the right tool for the job. most apps are boring CRUD apps and dont support chat.