Countdown timer

countdown-timer.markdown

Countdown timer

Building a countdown timer based off https://www.sitepoint.com/build-javascript-countdown-timer-no-dependencies/ and https://codepen.io/SitePoint/pen/MwNPVq

A Pen by janzeteachesit on CodePen.

License.

index.html

<!-- 

-->

<h1>Countdown Clock</h1>
<div id="clockdiv">
  <div>
    <span class="days"></span>
    <div class="smalltext">Days</div>
  </div>
  <div>
    <span class="hours"></span>
    <div class="smalltext">Hours</div>
  </div>
  <div><span class="minutes"></span>
    <div class="smalltext">Minutes</div>
  </div>
  <div><span class="seconds"></span>
    <div class="smalltext">Seconds</div>
  </div>
</div>

script.js

/* 
  Intro

*/

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

  function updateClock() {
    var t = getTimeRemaining(endtime);

    daysSpan.innerHTML = ('0' + t.days).slice(-2);
    hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
    minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
    secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);

    if (t.total <= 0) {
      clearInterval(timeinterval);
    }
  }

  updateClock(); 
  var timeinterval = setInterval(updateClock, 1000);
}
//var deadline = 'July 17 2017 07:59:59 GMT-0700';
var deadline = new Date(Date.parse(new Date()) + 100 * 24 * 60 * 60 * 1000);  // sets 15 day countdown
initializeClock('clockdiv', deadline);

// getTimeRemaining(deadline).minutes;

scripts

<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>

style.css

body {
	text-align: center;
	background: #00ECB9;
  font-family: lobster, sans-serif;
  font-weight: 200;
}

h1 {
  color: #396;
  font-weight: 100;
  font-size: 40px;
  margin: 40px 0px 20px;
}

#clockdiv {
	font-family: sans-serif;
	color: #fff;
	display: inline-block;
	font-weight: 100;
	text-align: center;
	font-size: 30px;
}

#clockdiv > div {
	padding: 10px;
	border-radius: 3px;
	background: #00BF96;
	display: inline-block;
}

#clockdiv div > span {
	padding: 15px;
	border-radius: 3px;
	background: #00816A;
	display: inline-block;
}

.smalltext {
	padding-top: 5px;
	font-size: 16px;
}

styles

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />