unix time to date javascript

const unixTime = 1210981217;
const date = new Date(unixTime*1000);
console.log(date.toLocaleDateString("en-US"));
//expected: "5/16/2008"var s = new Date(1504095567183).toLocaleDateString("en-US")
// expected output "8/30/2017"  
console.log(s);Math.round(new Date().getTime() / 1000).toString()new Date('2012.08.10').getTime() / 1000 //secs
new Date('2012.08.10').getTime() //milliseconds