get current time epoch javascript

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

1var a = Date.now();
2
3// Returns miliseconds since epoch

1const start = Date.now(); 
2/*gives the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC.*/

1let nowInMs = Date.now();
2let nowInSecond = Math.round(nowInMs/1000);
3console.log(nowInSecond); //