Race Condition in Async State Updates

1. Multiple async requests start, last one completes first, overwrites state with stale data
2. Conditional logic depends on operation A completing before B, but order varies
3. No abort mechanism when new request starts while previous still pending
4. UI state updates without waiting for all async operations to complete
5. Callback functions referencing stale closure variables

Use request IDs: only apply response if ID matches current request. Cancel previous requests when starting new one. Use async/await with proper error handling. Hold UI in loading state until all operations complete. In React: useEffect cleanup function to cancel when component unmounts. Consider promise race or Promise.all for coordinated async operations.