JSFiddle - React, Tailwind, and code Playground

by goldfingerxyz

HTML

<span>10:10</span>

JavaScript

setInterval(function() {
    var timer = $('span').html();
    timer = timer.split(':');
    var minutes = timer[0];
    var seconds = timer[1];
    seconds -= 1;
    if (minutes < 0) return;
    if (minutes < 10 && length.minutes != 2) minutes = '0' + minutes;
    if (seconds < 0 && minutes != 0) {
        minutes -= 1;
        seconds = 59;
    }
    else if (seconds < 10 && length.seconds != 2) seconds = '0' + seconds;
    $('span').html(minutes + ':' + seconds);
}, 1000);