Live data in React Native without polling: SSE, background handling and an honest status bar
typescript
dev.to
A wind turbine dashboard showed a value that looked perfectly fresh. It wasn't. The connection had dropped, the display had frozen, and nobody could tell. In monitoring, that's the worst kind of bug. It doesn't crash. It just quietly lies. This post shows how we built the live layer of the Windhunde app so that can't happen again: no polling, Server-Sent Events (SSE) end to end, and a status bar that always tells the truth. TL;DR Send a full snapshot first, then only deltas. Reconnecting b