Javascript倒计时器功能无法正常工作

Question

我开发了倒数计时器功能。

此功能正常。但问题是它也经历了负值。所以当它来到00:00:00时我想停止计数。  我怎么能这样做。请帮助我？

的Javascript

function initCountdown() {

 if( seconds == 0 && minutes == 0 && hours == 0 ){
      clearInterval( interval ); }
 if (seconds < 10) {
      outputElement.innerHTML = hours + ": " + minutes + ": " + "0" + seconds + " ";
 } else {
      outputElement.innerHTML = hours + ": " + minutes + ": " + seconds + " "; }} 
  function count(){
        time[2]--;
       if (time[2] == -1) {
          time[1]--;
          time[2] = 59
       }
    if (time[1] == -1) {
          time[0]--;
          time[1] = 59
         }
        print();
      }
   var outputElement = document.getElementById('demo');
   var time = document.getElementById("picker-dates1").value;
   time = time.split(':'); }

HTML

 <input type = "text" id = "picker-dates1"/>
 <P id="demo"></p>

Answer 1

将print();替换为if (time[0] >= 0) { print(); }