authelia/web/src/hooks/Mounted.ts

import { useRef, useEffect } from "react";

export function useIsMountedRef() {
    const isMountedRef = useRef(false);
    useEffect(() => {
        isMountedRef.current = true;
        return () => { isMountedRef.current = false };
    });
    return isMountedRef;
}