javascript - 倒计时js，不断重启

我正在学习，所以请客气:-)
我找到了完美的倒计时时钟。
我要实现的是在1字之后出现Lift Off!，但是由于某种原因，倒数时钟一直显示1

var startNum;
var currentNum;

function addClassDelayed(jqObj, c, to) {
    setTimeout(function() { jqObj.addClass(c); }, to);
}

function anim() {
  addClassDelayed($("#countdown"), "puffer", 600);
  if (currentNum == 0)  $('#countdown').html("Lift Off!"); else currentNum--;
  $('#countdown').html(currentNum+1);
  $('#countdown').removeClass("puffer");
}

$(function() {
  startNum = 5;
  currentNum = startNum;
  $("#countdown").html(currentNum); // init first time based on n
  self.setInterval(function(){anim()},1325);

});

最佳答案

$('#countdown').html(currentNum+1);覆盖您之前设置的任何内容。

function anim() {
  addClassDelayed($("#countdown"), "puffer", 600);
  if (currentNum == 0) {
      $('#countdown').html("Lift Off!");
      clearInterval(token)
  } else {
      currentNum--;
      $('#countdown').html(currentNum+1); // Only show if not "Lift Off!"
  }
  $('#countdown').removeClass("puffer");
}

var token;
$(function() {
  startNum = 5;
  currentNum = startNum;
  $("#countdown").html(currentNum); // init first time based on n
  token = self.setInterval(function(){anim()},1325);
});

根据Tyler的建议添加了clearInverval