How AbortController in useEffect Fixes React Memory Leaks on Navigation

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A React dashboard application was experiencing memory leaks and warnings when users navigated away from a page during active API requests. The root cause was asynchronous fetch calls inside useEffect continuing to run after their parent components had unmounted, triggering state updates on unmounted components. The fix involved using the browser-native AbortController API to cancel pending fetch requests in the useEffect cleanup function. Proper error handling was also added to distinguish expected AbortError exceptions from genuine network failures. The change improved application stability, reduced unnecessary memory usage, and reinforced the React principle that every side effect should include a cleanup strategy.

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