StresscountDownTimer

Responsive grid with CSS Grids

by Miklos Nagy

HTML

<div class="Grid">
  <div class="Grid-cell Grid--1of3 Grid-cell--center">
    <h1>Countdown Clock</h1>
  </div>
  
  <div class="Grid-cell Grid-cell--center">

<div id="clockdiv">
  <div>
    <span class="days"></span>
    <div class="smalltext">nap</div>
  </div>
  <div>
    <span class="hours"></span>
    <div class="smalltext">óra</div>
  </div>
  <div>
    <span class="minutes"></span>
    <div class="smalltext">perc</div>
  </div>
  <div>
    <span class="seconds"></span>
    <div class="smalltext">másodperc</div>
  </div>
</div>
  </div>
</div>

CSS

@import url('https://fonts.googleapis.com/css?family=Montserrat');

body{
	text-align: center;
	background: #FFC107;
  font-family: 'Montserrat', sans-serif;
  font-weight: 100;
}

h1{
  color: #f2f2f2;
  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: #3f3f3f4f;
	display: inline-block;
}

#clockdiv div > span{
	padding: 15px;
	border-radius: 3px;
	background: #2f2f2f;
	display: inline-block;
}

.smalltext{
	padding-top: 5px;
	font-size: 16px;
}
.Grid {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.Grid-cell {
  flex: 1;
}

.Grid--flexCells > .Grid-cell {
  display: flex;
}

.Grid--top {
  align-items: flex-start;
}

.Grid--bottom {
  align-items: flex-end;
}

.Grid--center {
  align-items: center;
}

.Grid--justifyCenter {
  justify-content: center;
}

.Grid-cell--top {
  align-self: flex-start;
}

.Grid-cell--bottom {
  align-self: flex-end;
}

.Grid-cell--center {
  align-self: center;
}

.Grid-cell--autoSize {
  flex: none;
}

.Grid--fit > .Grid-cell {
  flex: 1;
}

.Grid--full > .Grid-cell {
  flex: 0 0 100%;
}

.Grid--1of2 > .Grid-cell {
  flex: 0 0 50%;
}

.Grid--1of3 > .Grid-cell {
  flex: 0 0 33.3333%;
}

.Grid--1of4 > .Grid-cell {
  flex: 0 0 25%;
}

@media (--break-sm) {
  .small-Grid--fit > .Grid-cell {
    flex: 1;
  }
  .small-Grid--full > .Grid-cell {
    flex: 0 0 100%;
  }
  .small-Grid--1of2 > .Grid-cell {
    flex: 0 0 50%;
  }
  .small-Grid--1of3 > .Grid-cell {
    flex: 0 0 33.3333%;
  }
  .small-Grid--1of4 > .Grid-cell {
    flex: 0 0 25%;
  }
}

@media (--break-md) {
  .med-Grid--fit > .Grid-cell {
    flex: 1;
  }
  .med-Grid--full > .Grid-cell {
    flex: 0 0 100%;
  }
  .med-Grid--1of2 > .Grid-cell {
    flex: 0 0 50%;
  }
  .med-Grid--1of3 > .Grid-cell {
    flex: 0 0 33.3333%;
 ...

JavaScript

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 = t.days;
    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 randomDates = [0.5423 * 24 * 60 * 60 * 1000, 0.534 * 24 * 60 * 60 * 1000
];

var randomDate = randomDates[Math.floor(Math.random()*randomDates.length)];

var deadline = new Date(Date.parse(new Date()) + randomDate);
initializeClock('clockdiv', deadline);