JSFiddle - React, Tailwind, and code Playground

by Alfie

HTML

<h2>Timer is :</h2>

    <p id="countdown"></p>

CSS

.countdownHolder{
	width:450px;
	margin:0 auto;
	font: 40px/1.5 'Open Sans Condensed',sans-serif;
	text-align:center;
	letter-spacing:-3px;
}

.position{
	display: inline-block;
	height: 1.6em;
	overflow: hidden;
	position: relative;
	width: 1.05em;
}

.digit{
	position:absolute;
	display:block;
	width:1em;
	background-color:#444;
	border-radius:0.2em;
	text-align:center;
	color:#fff;
	letter-spacing:-1px;
}

.digit.static{
	box-shadow:1px 1px 1px rgba(4, 4, 4, 0.35);
	
	background-image: linear-gradient(bottom, #3A3A3A 50%, #444444 50%);
	background-image: -o-linear-gradient(bottom, #3A3A3A 50%, #444444 50%);
	background-image: -moz-linear-gradient(bottom, #3A3A3A 50%, #444444 50%);
	background-image: -webkit-linear-gradient(bottom, #3A3A3A 50%, #444444 50%);
	background-image: -ms-linear-gradient(bottom, #3A3A3A 50%, #444444 50%);
	
	background-image: -webkit-gradient(
		linear,
		left bottom,
		left top,
		color-stop(0.5, #3A3A3A),
		color-stop(0.5, #444444)
	);
}

/**
 * You can use these classes to hide parts
 * of the countdown that you don't need.
 */

.countDays{ /* display:none !important;*/ }
.countDiv0{ /* display:none !important;*/ }
.countHours{}
.countDiv1{}
.countMinutes{}
.countDiv2{}
.countSeconds{}


.countDiv{
	display:inline-block;
	width:16px;
	height:1.6em;
	position:relative;
}

.countDiv:before,
.countDiv:after{
	position:absolute;
	width:5px;
	height:5px;
	background-color:#444;
	border-radius:50%;
	left:50%;
	margin-left:-3px;
	top:0.5em;
	box-shadow:1px 1px 1px rgba(4, 4, 4, 0.5);
	content:'';
}

.countDiv:after{
	top:0.9em;
}

JavaScript

/**
 * @name		jQuery Count-UP Plugin
 * @author		Martin Angelov
 * @version 	1.0
 * @url			http://tutorialzine.com/2012/09/count-up-jquery/
 * @license		MIT License
 */

(function($){
	
	// Number of seconds in every time division
	var days	= 24*60*60,
		hours	= 60*60,
		minutes	= 60;
	
	// Creating the plugin
	$.fn.countup = function(prop){
		
		var options = $.extend({
			callback	: function(){},
			start		: new Date()
		},prop);
		
		var passed = 0, d, h, m, s, 
			positions;

		// Initialize the plugin
		init(this, options);
		
		positions = this.find('.position');
		
		(function tick(){
			
			passed = Math.floor((new Date() - options.start) / 1000);
			
			// Number of days passed
			d = Math.floor(passed / days);
			updateDuo(0, 1, d);
			passed -= d*days;
			
			// Number of hours left
			h = Math.floor(passed / hours);
			updateDuo(2, 3, h);
			passed -= h*hours;
			
			// Number of minutes left
			m = Math.floor(passed / minutes);
			updateDuo(4, 5, m);
			passed -= m*minutes;
			
			// Number of seconds left
			s = passed;
			updateDuo(6, 7, s);
			
			// Calling an optional user supplied callback
			options.callback(d, h, m, s);
			
			// Scheduling another call of this function in 1s
			setTimeout(tick, 1000);
		})();
		
		// This function updates two digit positions at once
		function updateDuo(minor,major,value){
			switchDigit(positions.eq(minor),Math.floor(value/10)%10);
			switchDigit(positions.eq(major),value%10);
		}
		
		return this;
	};


	function init(elem, options){
		elem.addClass('countdownHolder');

		// Creating the markup inside the container
		$.each(['Days','Hours','Minutes','Seconds'],function(i){
			$('<span class="count'+this+'">').html(
				'<span class="position">\
					<span class="digit static">0</span>\
				</span>\
				<span class="position">\
					<span class="digit static">0</span>\
				</span>'
			).appendTo(elem);
			
			if(this!="Seconds"){
				elem.append('<span class="countDiv...