JSFiddle - React, Tailwind, and code Playground

by David Simpson

HTML

<script src="https://codepen.io/shshaw/pen/BzObXp"></script>
<script src="https://cdn.rawgit.com/vuejs/vue/v1.0.24/dist/vue.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.1/moment.min.js"></script>
<script>console.clear();</script>

CSS

/**
 * @see: https://codepen.io/shshaw/pen/BzObXp
 */


html {
  height: 100%;
  font-family: sans-serif;
}
body {
  min-height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #EEE;
}
.flip-clock {
  text-align: center;
  perspective: 600px;
  margin: 0 auto;
}
.flip-clock *,
.flip-clock *:before,
.flip-clock *:after {
  box-sizing: border-box;
}
.flip-clock__piece {
  display: inline-block;
  margin: 0 0.2vw;
}
@media (min-width: 1000px) {
  .flip-clock__piece {
    margin: 0 5px;
  }
}
.flip-clock__slot {
  font-size: 1rem;
  line-height: 1.5;
  display: block;
  /*
  //position: relative;
  //top: -1.6em;
  z-index: 10;
  //color: #FFF;
*/
}
.flip-card {
  display: block;
  position: relative;
  padding-bottom: 0.72em;
  font-size: 2.25rem;
  line-height: 0.95;
}
@media (min-width: 1000px) {
  .flip-clock__slot {
    font-size: 1.2rem;
  }
  .flip-card {
    font-size: 3rem;
  }
}
/*////////////////////////////////////////*/
.flip-card__top,
.flip-card__bottom,
.flip-card__back-bottom,
.flip-card__back::before,
.flip-card__back::after {
  display: block;
  height: 0.72em;
  color: #ccc;
  background: #222;
  padding: 0.23em 0.25em 0.4em;
  border-radius: 0.15em 0.15em 0 0;
  backface-visiblity: hidden;
  transform-style: preserve-3d;
  width: 2.1em;
}
.flip-card__bottom,
.flip-card__back-bottom {
  color: #FFF;
  position: absolute;
  top: 50%;
  left: 0;
  border-top: solid 1px #000;
  background: #393939;
  border-radius: 0 0 0.15em 0.15em;
  pointer-events: none;
  overflow: hidden;
  z-index: 2;
}
.flip-card__back-bottom {
  z-index: 1;
}
.flip-card__bottom::after,
.flip-card__back-bottom::after {
  display: block;
  margin-top: -0.72em;
}
.flip-card__back::before,
.flip-card__bottom::after,
.flip-card__back-bottom::after {
  content: attr(data-value);
}
.flip-card__back {
  position: absolute;
  top: 0;
  height: 100%;
  left: 0%;
  pointer-events: none;
}
.flip-card__back::before {
  position: relative;
  overflow:...

Vue

var targetDate = '2022-11-22 15:21:00'


Vue.filter('zerofill', function (value) {
  //value = ( value < 0 ? 0 : value );
  return (value < 10 && value > -1 ? '0' : '') + value;
});

var Tracker = Vue.extend({
  template: `
  <span v-show="show" class="flip-clock__piece">
    <span class="flip-clock__card flip-card">
      <b class="flip-card__top">{{current | zerofill}}</b>
      <b class="flip-card__bottom" data-value="{{current | zerofill}}"></b>
      <b class="flip-card__back" data-value="{{previous | zerofill}}"></b>
      <b class="flip-card__back-bottom" data-value="{{previous | zerofill}}"></b>
    </span>
    <span class="flip-clock__slot">{{property}}</span>
  </span>`,
  props: ['property', 'time'],
  data: () => ({
    current: 0,
    previous: 0,
    show: false }),


  events: {
    time(newValue) {

      if (newValue[this.property] === undefined) {
        this.show = false;
        return;
      }

      var val = newValue[this.property];
      this.show = true;

      val = val < 0 ? 0 : val;

      if (val !== this.current) {

        this.previous = this.current;
        this.current = val;

        this.$el.classList.remove('flip');
        void this.$el.offsetWidth;
        this.$el.classList.add('flip');
      }

    } } });






var el = document.createElement('div');
document.body.appendChild(el);

var Countdown = new Vue({

  el: el,

  template: ` 
  <div class="flip-clock" data-date="2021-10-11" @click="update">
    <tracker 
      v-for="tracker in trackers"
      :property="tracker"
      :time="time"
      v-ref:trackers
    ></tracker>
  </div>
  `,

  props: ['date', 'callback'],

  data: () => ({
    time: {},
    i: 0,
    trackers: ['Days', 'Hours', 'Minutes', 'Seconds'] //'Random', 
  }),

  components: {
    Tracker },


  beforeDestroy() {
    if (window['cancelAnimationFrame']) {
      cancelAnimationFrame(this.frame);
    }
  },

  watch: {
    'date': function (newVal) {
      this.setCountdown(newVal);
    } },


 ...