定时器仅30分钟 [英] Timer for only 30 mins

问题描述

我想设置一个计时器，例如我的产品在添加到购物车时应该只显示30分钟。我试过了： -

I want to set a timer for example my product should be display for only 30 mins when it is added to cart. I tried :-

var d = new Date();

var minute = d.getHours()+30;

此外，我想向用户显示剩余时间（倒计时）

Also I want to show user how much time is remaining (countdown)

我知道这是错的。我想用jQuery做到这一点。我是jquery的新手，请帮助我

I know this is wrong. I want to do this using jQuery. I am new to jquery please help me on this

提前致谢。

推荐答案

是的，这有点正确，但我想告诉用户剩余多少时间是
，即倒计时应该开始。怎么做

yeah this somewhat correct but I want to show user how much time is remaining, i.e countdown should start.How to do that

好的，这个怎么样：

var countdown = 30 * 60 * 1000;
var timerId = setInterval(function(){
  countdown -= 1000;
  var min = Math.floor(countdown / (60 * 1000));
  //var sec = Math.floor(countdown - (min * 60 * 1000));  // wrong
  var sec = Math.floor((countdown - (min * 60 * 1000)) / 1000);  //correct

  if (countdown <= 0) {
     alert("30 min!");
     clearInterval(timerId);
     //doSomething();
  } else {
     $("#countTime").html(min + " : " + sec);
  }

}, 1000); //1000ms. = 1sec.

或者我建议你使用这些插件：
http://www.tripwiremagazine.com/2012/09/jquery-countdown-scripts.html

Or I recommend you use these plugins: http://www.tripwiremagazine.com/2012/09/jquery-countdown-scripts.html

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