<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1 id="clock"></h1>
<script type="text/javascript">
/*
현재 날짜와 시간을 다음과 같은 형식으로 출력하시오.
```
ex) 2023-05-10 17:04:08 (초는 계속 바뀜)
*/
var clock = document.getElementById("clock")
function watch() {
var date = new Date();
var year = date.getFullYear();
var month = date.getMonth() + 1;
var d = date.getDate();
var hour = date.getHours();
var minute = date.getMinutes();
var seconds = date.getSeconds();
if(seconds < 10){
seconds = "0" + seconds;
}
if(minute < 10){
minute = "0" + minute;
}
if(hour < 10){
hour = "0" + hour;
}
if(d < 10 ){
d = "0" + d;
}
if(month < 10){
month = "0" + month;
}
clock.innerHTML = `${year}-${month}-${d} ${hour}:${minute}:${seconds}`;
}
setInterval(watch,1000);
watch();
```
</script>
</body>
</html>
