React로 타이머 hooks 간단히 개발하기

import React, { useRef, useState } from 'react';

export const useTimer = () => {
  const [time, setTime] = useState(0);
  const [isRunning, setIsRunning] = useState(false);
  const intervalRef = useRef<NodeJS.Timeout>();
  
  const startTimer = () => {
    if (!isRunning) {
      setIsRunning(true);
      intervalRef.current = setInterval(() => {
        setTime(prevTime => prevTime + 1);
      }, 1000);
    }
  };
  
  const stopTimer = () => {
    if (isRunning) {
      setIsRunning(false);
      clearInterval(intervalRef.current);
    }
  };
  
  const resetTimer = () => {
    setIsRunning(false);
    clearInterval(intervalRef.current);
    setTime(0);
  };
  
  return { startTimer, stopTimer, resetTimer, time };
};