useEffect(() => let isMounted = true; // Prevents setting state if component unmounts
For complex state, combine with useReducer . Part 2: Additional Built-in Hooks 4. useReducer – Complex State Logic Goal: Manage state with reducers (predictable state updates). The Complete React Native Hooks Course
const addTodo = (text) => dispatch(addTodoAction(text)); useEffect(() => let isMounted = true; // Prevents
// useCallback: memoizes the function itself const handlePress = useCallback(() => console.log('Button pressed', count); , [count]); // Re-create only when count changes // useMemo: memoizes the result of a computation const expensiveValue = useMemo(() => return heavyComputation(data); , [data]); let isMounted = true
return data, loading, error ;