how to run Javascript even when tab or window is inactive in safari?

Question

In Chrome the timer is working fine but in Safari it pauses when the tab or window is inactive. I want it to keep running even when not active.

What am I missing? or can anyone help me tweak my script

jQuery(document).ready(function() {
  const startingMinutes = 15;
  let time = startingMinutes * 60;
  const countdownEl = document.getElementById('countdown');
  var myInterval = setInterval(updateCountdown, 1000);

  /* jQuery("input.ays_next.action-button").attr('disabled','disabled'); */

  /* jQuery("input.ays_next.action-button").click(function() {
    if(jQuery("[data-question-id=5]").css('display') == 'flex') {
        jQuery("input.ays_next.action-button").attr('disabled','disabled');
        alert("The paragraph was clicked.");
    }
  }); */

  function updateCountdown() {
    const minutes = Math.floor(time / 60);
    let seconds = time % 60;

    seconds = seconds < 10 ? '0' + seconds : seconds;

    countdownEl.innerHTML = `${minutes}: ${seconds}`;
    time--;
    time = time < 0 ? 0 : time;

    /* if(jQuery("[data-question-id=5]").css('display') == 'flex') {    
    } */
    if (time == 0) {
      jQuery("input.ays_next.action-button").removeAttr('disabled');
    }
  }

});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<span id="countdown" style="color: #f0b62e;">14: 35</span>