ahooks/es/useUnmountedRef/index.js

react hooks library

import { useEffect, useRef } from 'react';
var useUnmountedRef = function () {
    var unmountedRef = useRef(false);
    useEffect(function () {
        unmountedRef.current = false;
        return function () {
            unmountedRef.current = true;
        };
    }, []);
    return unmountedRef;
};
export default useUnmountedRef;
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