js将当前时间格式化为年-月-日 时:分:秒

时间：2021-12-28 08:40:22
<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Time</title>

</head>

<body>

<script type="text/javascript">

    var d=new Date();

    var year=d.getFullYear();

    var month=change(d.getMonth()+1);

    var day=change(d.getDate());

    var hour=change(d.getHours());

    var minute=change(d.getMinutes());

    var second=change(d.getSeconds());

    function change(t){

        if(t<10){

          return "0"+t;

        }else{

          return t;

        }

    }

    var time=year+'-'+month+'-'+day+' '+hour+':'+minute+':'+second;

    document.write(time);

</script>

</body>

</html>

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