JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    Нас зарегистрировалось: <span id="my__counter"></span>
</div>

JavaScript

jQuery(function(f){
    var el = f('#my__counter');
    setInterval(function(){
        var timestamp = Math.round(new Date().getTime() / 10000  - 140148410);
        el.text(timestamp);
    }, 1000);
});