Racing Conditions & Effect Cleanup
Use AbortController in useEffect to cancel stale fetch requests on re-render.
Welcome
In this lesson you will learn how race conditions happen in React effects that fetch data, and how to eliminate them using AbortController for cleanup.
What Is a Race Condition?
A race condition occurs when two async operations complete in an unpredictable order. In React, if a user navigates quickly between items, a slow fetch for item A may resolve after item B's fetch, showing stale data.
All lessons in this course
- Racing Conditions & Effect Cleanup
- useTransition for Non-Blocking UI Updates
- useDeferredValue for Input Debouncing
- Suspense for Data & Code Boundaries