1var timestamp = new Date().getTime();

1Math.round(new Date().getTime() / 1000).toString()

1var timestamp = 1607110465663
2var date = new Date(timestamp);
3console.log(date.getTime())
4console.log(date)

1var currentTimeInSeconds=Math.floor(Date.now()/1000); //unix timestamp in seconds
2var currentTimeInMilliseconds=Date.now(); // unix timestamp in milliseconds

1//  human date --> timestamp
2
3function toTimestamp(strDate){
4   var datum = Date.parse(strDate);
5   return datum/1000;
6}
7alert(toTimestamp('02/13/2009 23:31:30'));

1const toTimestamp=(strDate)=>{
2   var datum = Date.parse(strDate);
3   return datum/1000;
4}
5console.log(toTimestamp('02/13/2009 23:31:30'));