JSON-formatted time/date (2367828670431)/format converted to normal year-month-day format code _javascript tips

The key code looks like this:

function FormatDate (newdtime) 
var dt = new Date (parseint (Newdtime.slice (6)));
var year = Dt.getfullyear ();
var month = Dt.getmonth () + 1;
var date = Dt.getdate ();
var hour = dt.gethours ();
var minute = Dt.getminutes ();
var second = Dt.getseconds ();
Return year + "-" + month + "-" + Date + "" + Hour + ":" + Minute + ":" + second;
}

The above is a small series to introduce the JSON format of the time/date (2367828670431)/format into the normal year-month-day format code, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!