setTimeout func.

SessionTimeout.js

const SessionTimeout = () => {
  const [events, setEvents] = useState(['click', 'load', 'scroll']);
  const [second, setSecond] = useState(0);
  
  let timeStamp;
  let warningInactiveInterval = useRef();
  let startTimerInterval = useRef();

  // start inactive check
  let timeChecker = () => {
    startTimerInterval.current = setTimeout(() => {
      let storedTimeStamp = sessionStorage.getItem('lastTimeStamp');
      warningInactive(storedTimeStamp);
    }, 60000);
  };