Get date ISO string without time in javascript

Question

Is there a way to obtain a ISO string of a new date type in javascript with time at midnight without rebuilding a new date with date parts nor formatting it?

I've been trying this

var date = new Date();
date.setHours(0, 0, 0, 0);
document.write(date.toISOString());

and I am getting this

2017-04-20T04:00:00.000Z

I want to get this

2017-04-20T00:00:00.000Z

Is there a built-in function or way as I 've been trying to do to get the desired output (with rebuilding a date object with the date parts)?

Answer 1

var isoDate = new Date().toISOString().substring(0,10);
console.log(isoDate);