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

1const ts = () => Math.floor(new Date().getTime() / 1000);

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

1new Date().getTime()
2
3new Date().valueOf()

1Math.floor(new Date() / 1000) // in seconds

1Math.floor(Date.now() / 1000)
2