datetime - How can I get seconds since epoch in Javascript?

Question

On Unix, I can run date '+%s' to get the amount of seconds since epoch. But I need to query that in a browser front-end, not back-end.

Is there a way to find out seconds since Epoch in JavaScript?

Answer 1

var seconds = new Date() / 1000;

Or, for a less hacky version:

var d = new Date();
var seconds = d.getTime() / 1000;

Don't forget to Math.floor() or Math.round() to round to nearest whole number or you might get a very odd decimal that you don't want:

var d = new Date();
var seconds = Math.round(d.getTime() / 1000);