JSFiddle - React, Tailwind, and code Playground

by Denis Tverdokhlebov

HTML

<body>
  <div class="bg-gradient"></div>
  <div class="container">

    <h1>До отпуска осталось:</h1>
    <div id="CDT"></div>

  </div>
  <div class="container2"></div>

</body>

CSS

/* Contdonwn */

body {
    background: #222 url('http://icihaz.com/wp-content/uploads/2015/01/yacht2.jpg') no-repeat;
    background-position: top center;
    color: #fff;
    -moz-text-shadow: 0 -1px 0 #000;
    -webkit-text-shadow: 0 -1px 0 #000;
    text-shadow: 0 -1px 0 #000;
    font-family: 'Helvetica Neue','Helvetica','Arial', sans-serif;
}

.bg-gradient {
    position: fixed;
    width: 1000px;
    height: 1000px;
    top: 50%;
    left: 50%;
    z-index: -1;
    margin: -500px 0 0 -500px;
    background: url('../images/bg-gradient.png') no-repeat center;
}

.container {
    text-align: center;
    margin: 0 auto;
    width: 800px;
    height: 400px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -200px 0 0 -400px;
    z-index: 99999;
}

.container2 {
    text-align: center;
    margin: 0 auto;
    width: 800px;
    height: 320px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -200px 0 0 -400px;
    background-color: black;
    opacity: 0.5;
    z-index: 1;
    border-radius: 20px;
}

h1,
h2 {
    margin: 0;
    color: #eee;
    -moz-text-shadow: 0 3px 3px #000000;
    -webkit-text-shadow: 0 3px 3px #000000;
    text-shadow: 0 3px 3px #000000;
}

h1 {
    font-size: 60px;
    margin: 0 0 10px;
    line-height: 1;
    /*background-color: #4B68AC;*/
    padding-top: 40px;
}

h2 {
    font-size: 18px;
}

#CDT {
    font-size: 60px;
    color: #eee;
    margin: 55px 0 100px;
    font-weight: bold;
}

#CDT .number-wrapper {
    margin: 10px;
    -moz-box-shadow: 0 5px 8px #000000;
    -webkit-box-shadow: 0 5px 8px #000000;
    box-shadow: 0 5px 8px #000000;
    position: relative;
}

#CDT .number {
    display: inline-block;
    *display: inline;
    *zoom: 1;
    background: #000;
    background-image: linear-gradient(bottom, #000000 2%, #3c3c3c 50%, #000000 100%);
    background-image: -o-linear-gradient(bottom, #000000 2%, #3c3c3c 50%, #000000 100%);
    background-image: -moz-linear-gradient(bottom, #000000 2%, #3c3c3c...

JavaScript

function CountdownTimer(elm,tl,mes){
 this.initialize.apply(this,arguments);
}
CountdownTimer.prototype={
 initialize:function(elm,tl,mes) {
  this.elem = document.getElementById(elm);
  this.tl = tl;
  this.mes = mes;
 },countDown:function(){
  var timer='';
  var today=new Date();
  var day=Math.floor((this.tl-today)/(24*60*60*1000));
  var hour=Math.floor(((this.tl-today)%(24*60*60*1000))/(60*60*1000));
  var min=Math.floor(((this.tl-today)%(24*60*60*1000))/(60*1000))%60;
  var sec=Math.floor(((this.tl-today)%(24*60*60*1000))/1000)%60%60;
  var me=this;

  if( ( this.tl - today ) > 0 ){
   timer += '<span class="number-wrapper"><div class="line"></div><div class="caption">Дней</div><span class="number day">'+day+'</span></span>';
   timer += '<span class="number-wrapper"><div class="line"></div><div class="caption">Часов</div><span class="number hour">'+hour+'</span></span>';
   timer += '<span class="number-wrapper"><div class="line"></div><div class="caption">Минут</div><span class="number min">'+this.addZero(min)+'</span></span><span class="number-wrapper"><div class="line"></div><div class="caption">Секунд</div><span class="number sec">'+this.addZero(sec)+'</span></span>';
   this.elem.innerHTML = timer;
   tid = setTimeout( function(){me.countDown();},10 );
  }else{
   this.elem.innerHTML = this.mes;
   return;
  }
 },addZero:function(num){ return ('0'+num).slice(-2); }
}
function CDT(){

 // Конечная дата
 var tl = new Date('2021/05/01 00:00:00');
 var tl = new Date('2021/05/01 00:00:00');

 // Сообщение появляющееся после того, как истечет время.
 var timer = new CountdownTimer('CDT',tl,'<span class="number-wrapper"><div class="line"></div><span class="number end">Доби СВОБОДЕН!</span></span>');
 timer.countDown();
}
window.onload=function(){
 CDT();
}