Fix MobX Reactivity Issues

UI fails to update in MobX when components aren't wrapped with observer() or state isn't marked as observable via makeObservable(). Ensure observer wraps your React component and makeObservable is called in the constructor to make properties reactive.

Computed values stop recalculating when their dependencies aren't observable or when the computed property itself isn't declared. Verify all dependencies are observable and declare computed properties using makeObservable with the computed annotation.

Async updates don't propagate in MobX when state mutations occur outside actions. Wrap post-await mutations in runInAction to ensure changes trigger reactivity and update the UI after API calls or promises resolve.

Mutating arrays directly in MobX doesn't trigger updates; replace the entire array instead. Use assignment (store.items = newArray) or methods like splice on a fresh copy to ensure MobX detects the change and re-renders observers.

Yes. Follow MobX_Essentials guidelines: wrap components with observer, call makeObservable in constructors, use runInAction for async state changes, and replace arrays rather than mutating them to maintain consistent reactivity.

MobX works with async operations when you wrap post-await mutations in runInAction. Without runInAction, state changes after awaits don't notify observers, causing stale UI despite successful data fetches.