JSFiddle - React, Tailwind, and code Playground

by Manoj kumar Lakshman

HTML

<body>
    <div>Registration closes in <span id="time">05:00</span> minutes!</div>
    
    <input type="button" id="discount" value="Discount"/>
</body>

JavaScript

var timeDiscount = true;

function startTimer(duration, display) {
    var timer = duration, minutes, seconds;
    setInterval(function () {
        minutes = parseInt(timer / 60, 10)
        seconds = parseInt(timer % 60, 10);

        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;

        display.text(minutes + ":" + seconds);

        if (--timer < 0) {
            timer = duration;
             timeDiscount = false;
        }
    }, 1000);
}

jQuery(function ($) {
    var fiveMinutes = 60 * 1,
        display = $('#time');
    startTimer(fiveMinutes, display);
    
    //timeDiscount = true
  

  $("#discount").click(function() {
    alert(timeDiscount);
  })
});