Formatting a predefined Date value to ISO format in JavaScript

Question

I need to send a date value to the server in ISO Format "YYYY-MM-DDTHH:mm:ss.SSS[Z]" I don't need the time details so I am setting them as zero.

For that I am using the below code

var today = new Date();
var todayWithTimeAsZero = new Date(today.getFullYear(), today.getMonth(), today.getDate(), 0, 0, 0); 

I get todayWithTimeAsZero as Tue Jul 25 2017 22:06:03 GMT+0530 (India Standard Time)

Now how do I convert this date into an ISO format. I researched everywhere but no luck.

I tried var day = todayWithTimeAsZero.toISOString(); but this creates a new date object with the time values populated like so 2017-07-24T18:30:00.000Z. Also I have momentjs in my project may be in some way I can use that.

Answer 1

With moment.js you can get the current date as UTC, then set the time values to zero and get the ISO string:

moment() // current date
.utc() // convert to UTC
.hours(0).minutes(0).seconds(0).milliseconds(0) // set time values to zero
.toISOString() // format to ISO8601

The value of the formatted string is 2017-07-25T00:00:00.000Z.

---

You can also use the setUTCxxx methods of Date:

var today = new Date();
today.setUTCHours(0);
today.setUTCMinutes(0);
today.setUTCSeconds(0);
today.setUTCMilliseconds(0);

today.toISOString() will be 2017-07-25T00:00:00.000Z.