React 18 and Mapbox GL JS: Synchronizing External State with Imperative Camera APIs

Integrating Mapbox GL JS v2+ within a React 18 environment introduces a conflict between React's declarative state management and Mapbox's imperative API. While wrappers like react-map-gl provide a useMap hook, maintaining a single source of truth for the viewport (center, zoom, and bearing) becomes complex when using external state managers such as Redux or Zustand.

In React 18 Strict Mode, the double-invocation of effects can lead to race conditions where the map instance is recreated or updated before the previous instance has fully initialized. This often results in synchronization drift, where the external state and the actual map camera position diverge during rapid updates or component re-mounts.

Integration Constraints

• Requirement for a repeatable development environment using React 18 Strict Mode.
• Dependency on external state stores to drive the map viewport.
• Need to avoid stale closures within map.on('load') callbacks.

What is the recommended pattern for synchronizing an external state store with the Mapbox camera to prevent drift during React 18's double-mount cycle? How should the cleanup phase be handled to ensure imperative camera updates do not conflict with the declarative state lifecycle?