如何减少Javascript中的时间计数器

Question

Need to reduce the timing for the set times. 需要减少设定时间的时间。 Eg user logout time is 14:23:30 means need to show the remaining time seconds to the user. 例如，用户注销时间为14:23:30，则意味着需要向用户显示剩余时间（秒）。 Need to show the counter reducer time in Javascript. 需要在Javascript中显示计数器减少器时间。

Here is a timer. 这是一个计时器。 Like that how to reduce the time from after two minutes. 那样如何减少两分钟后的时间。

<!DOCTYPE html>
<html>
<body>

<p>A script on this page starts this clock:</p>

<p id="demo"></p>

<script>
var myVar = setInterval(myTimer, 1000);

function myTimer() {
    var d = new Date();
    document.getElementById("demo").innerHTML = d.toLocaleTimeString();
}
</script>

</body>
</html>

Answer 1

I guess this is what you are trying to get: 我想这就是您想要得到的：

 var initTime = new Date(); var i = 0; function myTimer(){ i++; var newTime = new Date(initTime.getTime() - i * 1000); document.getElementById("demo").innerHTML = newTime.toLocaleTimeString(); } var myVar = setInterval(myTimer, 1000);

 <div id="demo"></div>

Answer 2

If you want to implement timer and want to calculate based on logout time. 如果要实现计时器并要基于注销时间进行计算。

var sampleTimer = (function() {
 var today = new Date(),
 logoutTime = "14:23:30".split(":"),
 logoutTimeInsec = new Date(today.getFullYear(), today.getMonth(), today.getDate(), logoutTime[0], logoutTime[1], logoutTime[2]).getTime();

return  function() {
  var currentTime = new Date().getTime();
  console.log('check');
  if (logoutTimeInsec - currentTime > 0) {
   setTimeout(sampleTimer, 1000);
  }
}

}());

如何减少Javascript中的时间计数器

问题描述

2 个解决方案

解决方案1
1 2016-11-30 19:21:33

解决方案2
0 2016-11-30 19:39:43

如何减少Javascript中的时间计数器

问题描述

2 个解决方案

解决方案1 1 2016-11-30 19:21:33

解决方案2 0 2016-11-30 19:39:43

解决方案1
1 2016-11-30 19:21:33

解决方案2
0 2016-11-30 19:39:43