javascriptでタイムスタンプ

makeTimestamp(): string {
var dt = new Date();
var YY = dt.getFullYear().toString().slice(-2);
var MM = dt.getMonth() + 1;
var DD = dt.getDate();
var hh = dt.getHours();
var mm = dt.getMinutes();
var ss = dt.getSeconds();
var strYY = YY.toString().padStart(2, '0');
var strMM = MM.toString().padStart(2, '0');
var strDD = DD.toString().padStart(2, '0');
var strhh = hh.toString().padStart(2, '0');
var strmm = mm.toString().padStart(2, '0');
var strss = ss.toString().padStart(2, '0');
return strYY + strMM + strDD + strhh + strmm + strss;
}