succinct countdown

index.html

<div id="clockdiv">
    Days: <span class="days"></span><br>
    Hours: <span class="hours"></span><br>
    Minutes: <span class="minutes"></span><br>
    Seconds: <span class="seconds"></span>
</div>

script.js

var deadline = 'June 11 2016 13:00:00';

function getTimeRemaining(endtime){
  var t = Date.parse(endtime) - Date.parse(new Date());
  var seconds = Math.floor( (t/1000) % 60 );
  var minutes = Math.floor( (t/1000/60) % 60 );
  var hours = Math.floor( (t/(1000*60*60)) % 24 );
  var days = Math.floor( t/(1000*60*60*24) );
  return {
    'total': t,
    'days': days,
    'hours': hours,
    'minutes': minutes,
    'seconds': seconds
  };
}

function initializeClock(id, endtime){
  var clock = document.getElementById(id);
function updateClock(){
  var t = getTimeRemaining(endtime);
    clock.innerHTML = 'days: ' + t.days + '<br>' +
                      'hours: '+ t.hours + '<br>' +
                      'minutes: ' + t.minutes + '<br>' +
                      'seconds: ' + t.seconds;
  if(t.total<=0){
    clearInterval(timeinterval);
  }
}

updateClock(); // run function once at first to avoid delay
var timeinterval = setInterval(updateClock,1000);
}

initializeClock('clockdiv', deadline);
  var daysSpan = clock.querySelector('.days');
  var hoursSpan = clock.querySelector('.hours');
  var minutesSpan = clock.querySelector('.minutes');
  var secondsSpan = clock.querySelector('.seconds');

succinct countdown.markdown

succinct countdown

Auto updating timer. Courtesy of: http://www.sitepoint.com/build-javascript-countdown-timer-no-dependencies/ I'm dissecting this one to write my own variation.

A Pen by Sean on CodePen.

License.