JSFiddle - React, Tailwind, and code Playground

HTML

<div id="chrono1"></div>
<div id="chrono2"></div>
<div id="chrono3"></div>

JavaScript

var chrono = function(start, callback) {
    var _this = this;
    this.start = start;
    this.current = start;

    var calc = function() {
        var text = '';
        if(_this.current>0) {
            var d = new Date(0,0,0,0,0,_this.current),
            h=d.getHours(),
            m=d.getMinutes(),
            s=d.getSeconds();
            text = 'Il reste ' + (h>0 ? h + ' h ':'') + (m>0 ? m+' min ':' ') + (s>0 ?+s+' s ':' ');
            _this.current--;
        } else {
            clearInterval(_this.timer);
            text = 'Le temps est écoulé';
        }
        if(typeof callback == 'string') {
            document.getElementById(callback).innerHTML = text; 
        } else {
            callback(text);
        }
    }

    this.timer = setInterval(calc, 1000);
};

new chrono(4346, 'chrono1');
new chrono(6587, 'chrono2');
new chrono(56, 'chrono3');
new chrono(132, function(text) {
      console.log(text);  
});