Simple Digital Countdown Clock with jQuery and CSS3

Simple Digital Countdown Clock with jQuery and CSS3
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License: MIT
   

A digital countdown clock which allows you to count down in seconds and millisecond to a target date & time, built on top of CSS3, jQuery and requestAnimationFrame.

How to use it:

1. The Html structure for the digital countdown clock should be like this.

<section class="clock">
  <div id="digit-10" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-9" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-8" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-7" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-6" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-5" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-4" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-3" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-2" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-1" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
  <div id="digit-0" class="digit">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
  </div>
</section>

2. The required CSS styles for the countdown clock.

.clock {
  font-size: 0;
  text-align: center;
}

.clock .digit {
  display: inline-block;
  width: 88px;
  margin: 10px;
  -webkit-transform: skewX(-2deg);
  transform: skewX(-2deg);
}

.clock .digit#digit-2 .cell {
  -webkit-transition: opacity 50ms ease;
  transition: opacity 50ms ease;
}

.clock .digit#digit-3 .cell,
.clock .digit#digit-4 .cell,
.clock .digit#digit-5 .cell,
.clock .digit#digit-6 .cell,
.clock .digit#digit-7 .cell,
.clock .digit#digit-8 .cell,
.clock .digit#digit-9 .cell,
.clock .digit#digit-10 .cell,
.clock .digit#digit-11 .cell {
  -webkit-transition: opacity 100ms ease;
  transition: opacity 100ms ease;
}

.clock .digit .cell {
  width: 18px;
  height: 18px;
  margin: 2px;
  background-color: white;
  border-radius: 2px;
  display: inline-block;
  opacity: 0.1;
}

.clock .digit .cell.on { opacity: 1; }

3. Include the necessary jQuery javascript library in the document.

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

4. Add the following Javascript snippets into your document and set the target date & time you want to count down to at the beginning.

var grad = new Date(2016, 3, 16, 17, 0, 0, 0, 0),
  digit0 = $('#digit-0');
  digit1 = $('#digit-1'),
  digit2 = $('#digit-2'),
  digit3 = $('#digit-3'),
  digit4 = $('#digit-4'),
  digit5 = $('#digit-5'),
  digit6 = $('#digit-6'),
  digit7 = $('#digit-7'),
  digit8 = $('#digit-8'),
  digit9 = $('#digit-9'),
  digit10 = $('#digit-10');

function renderDigit(container, number) {
  var matrix;
  switch(number) {
    case 0:
      matrix = [
        true, true, true, true,
        true, false, false, true,
        true, false, false, true,
        true, false, false, true,
        true, false, false, true,
        true, false, false, true,
        true, true, true, true
      ];
      break;
    case 1:
      matrix = [
        false, false, false, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true
      ];
      break;
    case 2:
      matrix = [
        true, true, true, true,
        false, false, false, true,
        false, false, false, true,
        true, true, true, true,
        true, false, false, false,
        true, false, false, false,
        true, true, true, true
      ];
      break;
    case 3:
      matrix = [
        true, true, true, true,
        false, false, false, true,
        false, false, false, true,
        false, true, true, true,
        false, false, false, true,
        false, false, false, true,
        true, true, true, true
      ];
      break;
    case 4:
      matrix = [
        true, false, false, false,
        true, false, false, true,
        true, false, false, true,
        true, true, true, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true
      ];
      break;
    case 5:
      matrix = [
        true, true, true, true,
        true, false, false, false,
        true, false, false, false,
        true, true, true, true,
        false, false, false, true,
        false, false, false, true,
        true, true, true, true
      ];
      break;
    case 6:
      matrix = [
        true, true, true, true,
        true, false, false, false,
        true, false, false, false,
        true, true, true, true,
        true, false, false, true,
        true, false, false, true,
        true, true, true, true
      ];
      break;
    case 7:
      matrix = [
        true, true, true, true,
        true, false, false, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true
      ];
      break;
    case 8:
      matrix = [
        true, true, true, true,
        true, false, false, true,
        true, false, false, true,
        true, true, true, true,
        true, false, false, true,
        true, false, false, true,
        true, true, true, true
      ];
      break;
    case 9:
      matrix = [
        true, true, true, true,
        true, false, false, true,
        true, false, false, true,
        true, true, true, true,
        false, false, false, true,
        false, false, false, true,
        false, false, false, true
      ];
      break;
  }
  var children = container.children();
  var len = matrix.length;
  for (var i = 0; i < len; i++) {
    children.eq(i).toggleClass('on', matrix[i]);
  }
}

function render() {
  var now = new Date(),
    diff = String(grad.getTime() - now.getTime()),
    len = diff.length;
  renderDigit(digit0, Number(diff.charAt(len-1)));
  renderDigit(digit1, Number(diff.charAt(len-2)));
  renderDigit(digit2, Number(diff.charAt(len-3)));
  renderDigit(digit3, Number(diff.charAt(len-4)));
  renderDigit(digit4, Number(diff.charAt(len-5)));
  renderDigit(digit5, Number(diff.charAt(len-6)));
  renderDigit(digit6, Number(diff.charAt(len-7)));
  renderDigit(digit7, Number(diff.charAt(len-8)));
  renderDigit(digit8, Number(diff.charAt(len-9)));
  renderDigit(digit9, Number(diff.charAt(len-10)));
  renderDigit(digit10, Number(diff.charAt(len-11)));
  requestAnimationFrame(render);
}

requestAnimationFrame(render);

This awesome jQuery plugin is developed by mjswensen. For more Advanced Usages, please check the demo page or visit the official website.