??? ? ?? ?????. ????? ??? ?? ??????.
const [seconds, setSeconds] = useState(60)
useEffect(() => {
const interval = setInterval(() => {
setSeconds(seconds => seconds - 1);
}, 1000);
return () => clearInterval(interval);
}, []);
console.log("object"); 
1
0
0
?? ?? ??? ???? ?? ??? ??? ??? ????, ?? ???? ????? ?? ??? ??? ?? ?????.
??? ???? ??? ?? ????? ??? 0? ???? ?? ????. ??? ?? ???? ??? ???? ???. setInterval? ??? ?? ?? ?? ??? ??? ? ????.
????
![[? ?????] Node.js ?? ??](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
