In environments like factories and warehouses, connectivity can drop, yet work must continue. The offline-first pattern stores data locally in the browser via IndexedDB (with libraries like Dexie) and then synchronizes with the server when the connection returns.
The biggest challenge is conflict resolution during sync: who owns the correct version? A clear design for sync rules and timestamps makes the app reliable even in the toughest conditions and gives users a smooth, wait-free experience.
