js時間戳轉日期

//時間戳轉換成日期時間
function js_date_time(unixtime) {
   var dateTime = new Date(parseInt(unixtime) * 1000)
   var year = dateTime.getFullYear();
   var month = dateTime.getMonth() + 1;
   var day = dateTime.getDate();
   var hour = dateTime.getHours();
   var minute = dateTime.getMinutes();
   var second = dateTime.getSeconds();
   var now = new Date();
   var now_new = Date.parse(now.toDateString()); //typescript轉換寫法
   var milliseconds = now_new - dateTime;
   var timeSpanStr = year + '-' + month + '-' + day + ' ' + hour + ':' + minute;
   return timeSpanStr;
}