Remove Seconds/ Milliseconds from Date convert to ISO String

Question

I have a date object that I want to

1. remove the miliseconds/or set to 0
2. remove the seconds/or set to 0
3. Convert to ISO string

F

Answer 1

There is no need for a library, simply set the seconds and milliseconds to zero and use the built–in toISOString method:

var d = new Date();
d.setSeconds(0,0);
document.write(d.toISOString());

Note: toISOString is not supported by IE 8 and lower, there is a pollyfil on MDN.

Answer 2

This version works for me (without using an external library):

var now = new Date();
now.setSeconds(0, 0);
var stamp = now.toISOString().replace(/T/, " ").replace(/:00.000Z/, "");

produces strings like

2020-07-25 17:45

If you want local time instead, use this variant:

var now = new Date();
now.setSeconds(0, 0);
var isoNow = new Date(now.getTime() - now.getTimezoneOffset() * 60000).toISOString();
var stamp = isoNow.replace(/T/, " ").replace(/:00.000Z/, "");

Answer 3

Pure javascript solutions to trim off seconds and milliseconds (that is remove, not just set to 0). JSPerf says the second funcion is faster.

function getISOStringWithoutSecsAndMillisecs1(date) {
  const dateAndTime = date.toISOString().split('T')
  const time = dateAndTime[1].split(':')
  
  return dateAndTime[0]+'T'+time[0]+':'+time[1]
}

console.log(getISOStringWithoutSecsAndMillisecs1(new Date()))

 
function getISOStringWithoutSecsAndMillisecs2(date) {
  const dStr = date.toISOString()
  
  return dStr.substring(0, dStr.indexOf(':', dStr.indexOf(':')+1))
}

console.log(getISOStringWithoutSecsAndMillisecs2(new Date()))