如何查找setTimeout（）的剩余时间 [英] How to find the remaining time of a setTimeout()

问题描述

可能重复：

Javascript：在setTimeout（）中找到剩余时间？

我正在尝试使用 setTimeout（）作为在JS中暂停一系列事件的方法。

这里是我正在做什么以及我想在评论中做些什么的例子 - http://jsfiddle.net / 8m5Ww / 2 /

I'm trying to use setTimeout() as a way of pausing a series of events in JS.
Here's an example of what I'm doing and what I'd like to do in comments - http://jsfiddle.net/8m5Ww/2/

我可以用剩余的总毫秒数填充 var timeRemaining 的任何建议在 var a ？

Any suggestions how I can populate var timeRemaining with the total milliseconds remaining in var a?

推荐答案

你不能直接得到计时器剩余的秒数。
您可以在创建计时器时将时间戳保存在变量中，并使用它来计算下次执行的时间。

You can't get directly the timer remaining seconds. You can save in a variable the timestamp when the timer is created and use it to calculate the time to the next execution.

示例：

var startTimeMS = 0;  // EPOCH Time of event count started
var timerId;          // Current timer handler
var timerStep=5000;   // Time beetwen calls

// This function starts the timer
function startTimer(){
   startTimeMS = (new Date()).getTime();
   timerId = setTimeout("eventRaised",timerStep);
}


// This function raises the event when the time has reached and
// Starts a new timer to execute the opeartio again in the defined time
function eventRaised(){

  alert('WOP EVENT RAISED!');

  clearTimer(timerId); // clear timer
  startTimer(); // do again
}

// Gets the number of ms remaining to execute the eventRaised Function
function getRemainingTime(){
    return  timerStep - ( (new Date()).getTime() - startTimeMS );
}

• 这是创建的自定义示例代码飞。



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