JSFiddle - React, Tailwind, and code Playground

HTML

<div id="time"></div>
<button>start</button>

JavaScript

var backtm = 10;
function cuentacuenta () {
    
    if(self.intervalo)
        return;

    var display = $('#time'),
        mins, seconds;
        intervalo = setInterval(function() {
        mins = parseInt(backtm / 60)
        seconds = parseInt(backtm % 60);
        seconds = (seconds < 10) ? "0" + seconds : seconds;
        
        display.text("0" + mins + ":" + seconds);
        backtm--;
        if (backtm < 0) {
            backtm = 5;
            clearInterval(intervalo);
            delete intervalo;
        } 
    }, 1000);
        
}

$(document).ready(function () {
  $( "button" ).click(function() {
    cuentacuenta();
  });
});