JSFiddle - React, Tailwind, and code Playground

HTML

<div id="link_1">
А вот!
</div>

JavaScript

timedown("2020-10-28T07:07:00+02:00","link_1");

function timedown(ti,id){

var countDownDate = new Date(ti).getTime();

var x = setInterval(function() {

    var now = new Date().getTime();
    
    var distance = countDownDate - now, adist=Math.abs(distance);
    
    var pad = n=>(n < 10? "0":"") + n;  
    
    var days = Math.floor(adist / (1000 * 60 * 60 * 24));
    var hours = Math.floor((adist % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
    var minutes = Math.floor((adist % (1000 * 60 * 60)) / (1000 * 60));
    var seconds = Math.round((adist % (1000 * 60)) / 1000);

   document.getElementById(id).innerHTML = 
   (distance > 0
   ? "до входа "  + (days!=0 ? days + ":" : "") + pad(hours)+ ":" + pad(minutes) + ":" + pad(seconds)               : "уже проходит " + (days!=0 ? days + ":" : "") + pad(hours) + ":" + pad(minutes) + ":" + pad(seconds)
   );
    
}, 1000);}