Js将时间戳转成日期格式

//时间戳转日期
function timetoadd0(m){
  return m<10?'0'+m:m;
}
function timetodate(number)
{
  var time = new Date(number*1000);
  var y = time.getFullYear();
  var m = time.getMonth()+1;
  var d = time.getDate();
  var h = time.getHours();
  var mm = time.getMinutes();
  var s = time.getSeconds();
  return y+'-'+timetoadd0(m)+'-'+timetoadd0(d)+' '+timetoadd0(h)+':'+timetoadd0(mm)+':'+timetoadd0(s);
}

//使用方法
var starttime = timetodate(1661850794);