React snippet for tracking user enters or leaves a page

snippet.js

const [lastVisit, setLastVisit] = useState(null);

useEffect(
    () =>
      history.listen((e) => {
        logEvent(TrackEvents.PAGE_VISIT, { route: e.pathname });
        const now = Date.now() / 1000;
        lastVisit &&
          logEvent(TrackEvents.PAGE_LEAVE, {
            route: lastVisit.path,
            time: now - lastVisit.visited,
          });
        setLastVisit({ path: e.pathname, visited: now });
      }),
    [lastVisit, history]
);