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UseIsMounted
This fixes the following warning in certain cases: Can't perform a React state update on an unmounted component
RESETRUNFULL
import { useRef, useEffect } from 'react';export function useIsMounted() {
const isMounted = useRef(false);
useEffect(() => {
isMounted.current = true;
return () => isMounted.current = false;
}, []);
return isMounted;}function Book() {
const isMounted = useIsMounted(); //...
useEffect(() => {
asyncOperation().then(data => { if (isMounted.current) { setState(data); }})
}); //...}