functions.js

const input = document.querySelector('textarea');
input.addEventListener('input', startTimer);
document.getElementById('timer').innerHTML =
        005 + ":0" + 000;
        function startTimer() {
        var presentTime = document.getElementById('timer').innerHTML;
        var timeArray = presentTime.split(/[:]+/);
        var m = timeArray[0];
        var s = checkSecond((timeArray[1] - 1));
        if(s==59){m=m-1}
        input.removeEventListener('input', startTimer);
        if(m<0)
        {
          s = 0;
          m = 0;
          document.getElementById("entry").submit();
          alert('timer completed')
        }
        document.getElementById('timer').innerHTML =
          m + ":" + s;
          console.log(m)
          setTimeout(startTimer, 1000);
        }
        function checkSecond(sec) {
            if (sec < 10 && sec >= 0) {sec = "0" + sec}; // add zero in front of numbers < 10
            if (sec < 0) {sec = "59"};
            return sec;
        }