JSFiddle - React, Tailwind, and code Playground

HTML

TIME LEFT: <font size="5" color='#F7D358'><span id='timer_div'></span></font>

JavaScript

var seconds_left = 60;
var interval = setInterval(function() {
    document.getElementById('timer_div').innerHTML = --seconds_left;

    if (seconds_left <= 0)
    {
        document.getElementById('timer_div').innerHTML = '...';
        clearInterval(interval);
    }
}, 1000);