jQuery Timer example for wordpress

HTML, CSS Code

<style type="text/css">

/* general styling */

div#countdown {
    background: <?php echo $itemData['color']; ?>;
}

.container {
  color: #333;
  margin: 0 auto;
  text-align: center;
}

#countdown h1 {
  font-weight: normal;
  letter-spacing: .125rem;
  text-transform: uppercase;
}

#countdown li {
  display: inline-block;
  font-size: 1.5em;
  list-style-type: none;
  padding: 1em;
  text-transform: uppercase;
}

#countdown li span {
  display: block;
  font-size: 4.5rem;
}

#countdown .message {
  font-size: 4rem;
}

#content {
  display: none;
  padding: 1rem;
}

#countdown .emoji {
  padding: 0 .25rem;
}

@media all and (max-width: 768px) {
  #countdown h1 {
    font-size: 1.5rem;
  }
  
  #countdown li {
    font-size: 1.125rem;
    padding: .75rem;
  }
  
  #countdown li span {
    font-size: 3.375rem;
  }
}

  </style>

  

 
 
  <div class="an-slider-shortcode-wrapper">
  <div class="container">
  <h1 id="headline">Countdown to my birthday:</h1>
  <div id="countdown">
    <ul>
      <li><span id="days"></span>days</li>
      <li><span id="hours"></span>Hours</li>
      <li><span id="minutes"></span>Minutes</li>
      <li><span id="seconds"></span>Seconds</li>
    </ul>
  </div>
  <div class="message">
    <div id="content">
      <span class="emoji">🥳</span>
      <span class="emoji">🎉</span>
      <span class="emoji">🎂</span>
    </div>
  </div>
</div>
  </div> <!-- #shortcode-wrapper -->

JS/jQuery Code

(function() {
    const second = 1000,
        minute = second * 60,
        hour = minute * 60,
        day = hour * 24;

    let birthday = "Feb 19, 2023 00:00:00",
        countDown = new Date(birthday).getTime(),
        x = setInterval(function() {

            let now = new Date().getTime(),
                distance = countDown - now;

            document.getElementById("days").innerText = Math.floor(distance / (day)),
                document.getElementById("hours").innerText = Math.floor((distance % (day)) / (hour)),
                document.getElementById("minutes").innerText = Math.floor((distance % (hour)) / (minute)),
                document.getElementById("seconds").innerText = Math.floor((distance % (minute)) / second);

            //do something later when date is reached
            if (distance < 0) {
                let headline = document.getElementById("headline"),
                    countdown = document.getElementById("countdown"),
                    content = document.getElementById("content");

                // headline.innerText = "كل عام وانتم بخير!";
                headline.innerText = an_script_var.message;
                countdown.style.display = "none";
                content.style.display = "block";

                clearInterval(x);
            }
            //seconds
        }, 0)
}());