Determine minutes until midnight

Question

How would you go about determining how many minutes until midnight of the current day using javascript?

Answer 1

Perhaps:

function minsToMidnight() {
  var now = new Date();
  var then = new Date(now);
  then.setHours(24, 0, 0, 0);
  return (then - now) / 6e4;
}

console.log(minsToMidnight());

or

function minsToMidnight() {
  var msd = 8.64e7;
  var now = new Date();
  return (msd - (now - now.getTimezoneOffset() * 6e4) % msd) / 6e4;
}

console.log(minsToMidnight())

and there is:

function minsToMidnight(){
  var d = new Date();
  return (-d + d.setHours(24,0,0,0))/6e4;
}

console.log(minsToMidnight());