Sharing State Across Packages and Apps in a React Monorepo (Web + Mobile)

The article addresses the challenge of sharing state across packages and apps in a React monorepo spanning web and mobile platforms. It introduces shared-state-bridge, a lightweight (~1.2 KB) cross-package state store that uses named bridges, built-in WebSocket sync, and Symbol.for for global resolution. The library supports React 18 via useSyncExternalStore, offers persistence for both localStorage and AsyncStorage, and is fully typed with zero dependencies.