Javascript Date get number of seconds till tomorrow

Introduction

We would like to create a function getSecondsToTomorrow().

It that returns the number of seconds till tomorrow.

For instance, if now is 23:00, then: 

getSecondsToTomorrow() == 3600



function getSecondsToTomorrow() {
  let now = new Date();

  // tomorrow date
  let tomorrow = new Date(now.getFullYear(), now.getMonth(), now.getDate()+1);

  let diff = tomorrow - now; // difference in ms
  return Math.round(diff / 1000); // convert to seconds
}
console.log(getSecondsToTomorrow());

Alternative solution: 

function getSecondsToTomorrow() {
  let now = new Date();
  let hour = now.getHours();
  let minutes = now.getMinutes();
  let seconds = now.getSeconds();
  let totalSecondsToday = (hour * 60 + minutes) * 60 + seconds;
  let totalSecondsInADay = 86400;

  return totalSecondsInADay - totalSecondsToday;
}
console.log(getSecondsToTomorrow());/* w  ww.  j a v  a  2  s.co m*/



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