Question

如果我有通过var t = setTimeout("dosomething()", 5000)

设置的有效超时运行

无论如何暂停并恢复它？

<小时/> 有没有办法让剩余时间在当前超时？或者我必须在变量中，当设置超时时，存储当前时间，然后我们暂停，从而获得现在和之间的差异？

Answer 1

你可以像这样包裹window.setTimeout，我认为这与你在问题中建议的相似：

function Timer(callback, delay) {
    var timerId, start, remaining = delay;

    this.pause = function() {
        window.clearTimeout(timerId);
        remaining -= Date.now() - start;
    };

    this.resume = function() {
        start = Date.now();
        window.clearTimeout(timerId);
        timerId = window.setTimeout(callback, remaining);
    };

    this.resume();
}

var timer = new Timer(function() {
    alert("Done!");
}, 1000);

timer.pause();
// Do some stuff...
timer.resume();

Answer 2

这样的事情应该可以解决问题。

function Timer(fn, countdown) {
    var ident, complete = false;

    function _time_diff(date1, date2) {
        return date2 ? date2 - date1 : new Date().getTime() - date1;
    }

    function cancel() {
        clearTimeout(ident);
    }

    function pause() {
        clearTimeout(ident);
        total_time_run = _time_diff(start_time);
        complete = total_time_run >= countdown;
    }

    function resume() {
        ident = complete ? -1 : setTimeout(fn, countdown - total_time_run);
    }

    var start_time = new Date().getTime();
    ident = setTimeout(fn, countdown);

    return { cancel: cancel, pause: pause, resume: resume };
}

Answer 3

没有。您需要取消它（clearTimeout），测量自启动以来的时间并使用新时间重新启动它。

Answer 4

Tim Downs answer的略微修改版本。但是，自从Tim rolled back编辑以来，我自己就回答这个问题。我的解决方案可以使用额外的arguments作为第三个（3,4,5 ...）参数并清除计时器：

function Timer(callback, delay) {
    var args = arguments,
        self = this,
        timer, start;

    this.clear = function () {
        clearTimeout(timer);
    };

    this.pause = function () {
        this.clear();
        delay -= new Date() - start;
    };

    this.resume = function () {
        start = new Date();
        timer = setTimeout(function () {
            callback.apply(self, Array.prototype.slice.call(args, 2, args.length));
        }, delay);
    };

    this.resume();
}

正如Tim所提到的，IE lt 9中没有额外的参数，但我工作了一些，所以它也可以在oldIE中使用。

用法：new Timer(Function, Number, arg1, arg2, arg3...)

function callback(foo, bar) {
    console.log(foo); // "foo"
    console.log(bar); // "bar"
}

var timer = new Timer(callback, 1000, "foo", "bar");

timer.pause();
document.onclick = timer.resume;

Answer 5

Timeout很容易找到解决方案，但Interval有点棘手。

我想出了以下两个类来解决这个问题：

function PauseableTimeout(func, delay){
    this.func = func;

    var _now = new Date().getTime();
    this.triggerTime = _now + delay;

    this.t = window.setTimeout(this.func,delay);

    this.paused_timeLeft = 0;

    this.getTimeLeft = function(){
        var now = new Date();

        return this.triggerTime - now;
    }

    this.pause = function(){
        this.paused_timeLeft = this.getTimeLeft();

        window.clearTimeout(this.t);
        this.t = null;
    }

    this.resume = function(){
        if (this.t == null){
            this.t = window.setTimeout(this.func, this.paused_timeLeft);
        }
    }

    this.clearTimeout = function(){ window.clearTimeout(this.t);}
}

function PauseableInterval(func, delay){
    this.func = func;
    this.delay = delay;

    this.triggerSetAt = new Date().getTime();
    this.triggerTime = this.triggerSetAt + this.delay;

    this.i = window.setInterval(this.func, this.delay);

    this.t_restart = null;

    this.paused_timeLeft = 0;

    this.getTimeLeft = function(){
        var now = new Date();
        return this.delay - ((now - this.triggerSetAt) % this.delay);
    }

    this.pause = function(){
        this.paused_timeLeft = this.getTimeLeft();
        window.clearInterval(this.i);
        this.i = null;
    }

    this.restart = function(sender){
        sender.i = window.setInterval(sender.func, sender.delay);
    }

    this.resume = function(){
        if (this.i == null){
            this.i = window.setTimeout(this.restart, this.paused_timeLeft, this);
        }
    }

    this.clearInterval = function(){ window.clearInterval(this.i);}
}

这些可以这样实现：

var pt_hey = new PauseableTimeout(function(){
    alert("hello");
}, 2000);

window.setTimeout(function(){
    pt_hey.pause();
}, 1000);

window.setTimeout("pt_hey.start()", 2000);

这个例子将设置一个暂停的超时（pt_hey），它被安排在两秒钟后发出警报，“嘿”。另一个超时在一秒后暂停pt_hey。第二次超时在两秒后恢复pt_hey。 pt_hey运行一秒钟，暂停一秒钟，然后恢复运行。 pt_hey在三秒后触发。

现在是比较棘手的时间间隔

var pi_hey = new PauseableInterval(function(){
    console.log("hello world");
}, 2000);

window.setTimeout("pi_hey.pause()", 5000);

window.setTimeout("pi_hey.resume()", 6000);

此示例设置一个可暂停的Interval（pi_hey），每两秒在控制台中写入“hello world”。超时会在五秒后暂停pi_hey。六秒后，另一个超时恢复pi_hey。所以pi_hey将触发两次，运行一秒，暂停一秒，运行一秒，然后每2秒继续触发。

其他功能

clearTimeout（）和 clearInterval（）

pt_hey.clearTimeout();和pi_hey.clearInterval();可以作为清除超时和间隔的简便方法。
getTimeLeft（）

pt_hey.getTimeLeft();和pi_hey.getTimeLeft();将返回计划发生下一次触发之前的毫秒数。

Answer 6

“暂停”和“恢复”在setTimeout的上下文中并没有多大意义，这是一次性事物。你的意思是setInterval？如果是，不，你不能暂停它，你只能取消它（clearInterval），然后再重新安排它。详情Timers section中所有这些内容的详细信息。

// Setting
var t = setInterval(doSomething, 1000);

// Pausing (which is really stopping)
clearInterval(t);
t = 0;

// Resuming (which is really just setting again)
t = setInterval(doSomething, 1000);

Answer 7

我需要计算显示进度条的已用时间和剩余时间。使用接受的答案并不容易。对于此任务，'setInterval'优于'setTimeout'。所以，我创建了这个可以在任何项目中使用的Timer类。

https://jsfiddle.net/ashraffayad/t0mmv853/

'use strict';


    //Constructor
    var Timer = function(cb, delay) {
      this.cb = cb;
      this.delay = delay;
      this.elapsed = 0;
      this.remaining = this.delay - self.elapsed;
    };

    console.log(Timer);

    Timer.prototype = function() {
      var _start = function(x, y) {
          var self = this;
          if (self.elapsed < self.delay) {
            clearInterval(self.interval);
            self.interval = setInterval(function() {
              self.elapsed += 50;
              self.remaining = self.delay - self.elapsed;
              console.log('elapsed: ' + self.elapsed, 
                          'remaining: ' + self.remaining, 
                          'delay: ' + self.delay);
              if (self.elapsed >= self.delay) {
                clearInterval(self.interval);
                self.cb();
              }
            }, 50);
          }
        },
        _pause = function() {
          var self = this;
          clearInterval(self.interval);
        },
        _restart = function() {
          var self = this;
          self.elapsed = 0;
          console.log(self);
          clearInterval(self.interval);
          self.start();
        };

      //public member definitions
      return {
        start: _start,
        pause: _pause,
        restart: _restart
      };
    }();


    // - - - - - - - - how to use this class

    var restartBtn = document.getElementById('restart');
    var pauseBtn = document.getElementById('pause');
    var startBtn = document.getElementById('start');

    var timer = new Timer(function() {
      console.log('Done!');
    }, 2000);

    restartBtn.addEventListener('click', function(e) {
      timer.restart();
    });
    pauseBtn.addEventListener('click', function(e) {
      timer.pause();
    });
    startBtn.addEventListener('click', function(e) {
      timer.start();
    });

Answer 8

/恢复

使用Class-y syntactic sugar的ES6版本

（略微修改：添加了start（））

class Timer {
  constructor(callback, delay) {
    this.callback = callback
    this.remainingTime = delay
    this.startTime
    this.timerId
  }

  pause() {
    clearTimeout(this.timerId)
    this.remainingTime -= new Date() - this.startTime
  }

  resume() {
    this.startTime = new Date()
    clearTimeout(this.timerId)
    this.timerId = setTimeout(this.callback, this.remainingTime)
  }

  start() {
    this.timerId = setTimeout(this.callback, this.remainingTime)
  }
}

// supporting code
const pauseButton = document.getElementById('timer-pause')
const resumeButton = document.getElementById('timer-resume')
const startButton = document.getElementById('timer-start')

const timer = new Timer(() => {
  console.log('called');
  document.getElementById('change-me').classList.add('wow')
}, 3000)

pauseButton.addEventListener('click', timer.pause.bind(timer))
resumeButton.addEventListener('click', timer.resume.bind(timer))
startButton.addEventListener('click', timer.start.bind(timer))

<!doctype html>
<html>
<head>
  <title>Traditional HTML Document. ZZz...</title>
  <style type="text/css">
    .wow { color: blue; font-family: Tahoma, sans-serif; font-size: 1em; }
  </style>
</head>
<body>
  <h1>DOM &amp; JavaScript</h1>

  <div id="change-me">I'm going to repaint my life, wait and see.</div>

  <button id="timer-start">Start!</button>
  <button id="timer-pause">Pause!</button>
  <button id="timer-resume">Resume!</button>
</body>
</html>

Answer 9

你也可以用事件来实现它。

不是计算时差，而是开始和停止收听一直在后台运行的'tick'事件：

var Slideshow = {

  _create: function(){                  
    this.timer = window.setInterval(function(){
      $(window).trigger('timer:tick'); }, 8000);
  },

  play: function(){            
    $(window).bind('timer:tick', function(){
      // stuff
    });       
  },

  pause: function(){        
    $(window).unbind('timer:tick');
  }

};

Answer 10

如果您无论如何使用jquery，请查看$.doTimeout插件。这比setTimeout有了很大的改进，包括让你用你指定的单个字符串id跟踪你的超时，并且每次设置它都不会改变，并实现简单的取消，轮询循环和放大。去抖等等。我最常用的jquery插件之一。

不幸的是，它不支持暂停/恢复开箱即用。为此，您需要包装或扩展$ .doTimeout，可能与接受的答案类似。

Answer 11

您可以查看clearTimeout()

或暂停，具体取决于遇到某个条件时设置的全局变量。就像按下按钮一样。

  <button onclick="myBool = true" > pauseTimeout </button>

  <script>
  var myBool = false;

  var t = setTimeout(function() {if (!mybool) {dosomething()}}, 5000);
  </script>

Answer 12

我需要能够暂停setTimeout（）以获得类似幻灯片的功能。

这是我自己实现的可暂停计时器。它集成了Tim Down的答案中的评论，例如更好的暂停（内核的评论）和一种原型的形式（Umur Gedik的评论。）

function Timer( callback, delay ) {

    /** Get access to this object by value **/
    var self = this;



    /********************* PROPERTIES *********************/
    this.delay = delay;
    this.callback = callback;
    this.starttime;// = ;
    this.timerID = null;


    /********************* METHODS *********************/

    /**
     * Pause
     */
    this.pause = function() {
        /** If the timer has already been paused, return **/
        if ( self.timerID == null ) {
            console.log( 'Timer has been paused already.' );
            return;
        }

        /** Pause the timer **/
        window.clearTimeout( self.timerID );
        self.timerID = null;    // this is how we keep track of the timer having beem cleared

        /** Calculate the new delay for when we'll resume **/
        self.delay = self.starttime + self.delay - new Date().getTime();
        console.log( 'Paused the timer. Time left:', self.delay );
    }


    /**
     * Resume
     */
    this.resume = function() {
        self.starttime = new Date().getTime();
        self.timerID = window.setTimeout( self.callback, self.delay );
        console.log( 'Resuming the timer. Time left:', self.delay );
    }


    /********************* CONSTRUCTOR METHOD *********************/

    /**
     * Private constructor
     * Not a language construct.
     * Mind var to keep the function private and () to execute it right away.
     */
    var __construct = function() {
        self.starttime = new Date().getTime();
        self.timerID = window.setTimeout( self.callback, self.delay )
    }();    /* END __construct */

}   /* END Timer */

示例：

var timer = new Timer( function(){ console.log( 'hey! this is a timer!' ); }, 10000 );
timer.pause();

要测试代码，请多次使用timer.resume()和timer.pause()并检查剩余时间。（确保您的控制台已打开。）

使用此对象代替setTimeout（）就像用timerID = setTimeout( mycallback, 1000)替换timer = new Timer( mycallback, 1000 )一样简单。然后您可以使用timer.pause()和timer.resume()。

Answer 13

function delay (ms)   {  return new Promise(resolve => setTimeout(resolve, s));  }

“异步”工作演示位于： site zarsoft.info

Answer 14

基于评分最高的答案的打字稿实现

/** Represents the `setTimeout` with an ability to perform pause/resume actions */
export class Timer {
    private _start: Date;
    private _remaining: number;
    private _durationTimeoutId?: NodeJS.Timeout;
    private _callback: (...args: any[]) => void;
    private _done = false;
    get done () {
        return this._done;
    }

    constructor(callback: (...args: any[]) => void, ms = 0) {
        this._callback = () => {
            callback();
            this._done = true;
        };
        this._remaining = ms;
        this.resume();
    }

    /** pauses the timer */
    pause(): Timer {
        if (this._durationTimeoutId && !this._done) {
            this._clearTimeoutRef();
            this._remaining -= new Date().getTime() - this._start.getTime();
        }
        return this;
    }

    /** resumes the timer */
    resume(): Timer {
        if (!this._durationTimeoutId && !this._done) {
            this._start = new Date;
            this._durationTimeoutId = setTimeout(this._callback, this._remaining);
        }
        return this;
    }

    /** 
     * clears the timeout and marks it as done. 
     * 
     * After called, the timeout will not resume
     */
    clearTimeout() {
        this._clearTimeoutRef();
        this._done = true;
    }

    private _clearTimeoutRef() {
        if (this._durationTimeoutId) {
            clearTimeout(this._durationTimeoutId);
            this._durationTimeoutId = undefined;
        }
    }

}

Answer 15

我认为你找不到比clearTimeout更好的东西。无论如何，你总是可以在以后安排另一次超时，而不是'恢复'它。

Answer 16

您可以像下面那样在服务器端（Node.js）暂停setTimeout

const PauseableTimeout = function(callback, delay) {
    var timerId, start, remaining = delay;

    this.pause = function() {
        global.clearTimeout(timerId);
        remaining -= Date.now() - start;
    };

    this.resume = function() {
        start = Date.now();
        global.clearTimeout(timerId);
        timerId = global.setTimeout(callback, remaining);
    };

    this.resume();
};

，您可以如下进行检查

var timer = new PauseableTimeout(function() {
    console.log("Done!");
}, 3000);
setTimeout(()=>{
    timer.pause();
    console.log("setTimeout paused");
},1000);

setTimeout(()=>{
    console.log("setTimeout time complete");
},3000)

setTimeout(()=>{
    timer.resume();
    console.log("setTimeout resume again");
},5000)

Answer 17

如果有人想要尊敬的@SeanVieira here 分享的 TypeScript 版本，你可以使用这个：

    public timer(fn: (...args: any[]) => void, countdown: number): { onCancel: () => void, onPause: () => void, onResume: () => void } {
        let ident: NodeJS.Timeout | number;
        let complete = false;
        let totalTimeRun: number;
        const onTimeDiff = (date1: number, date2: number) => {
            return date2 ? date2 - date1 : new Date().getTime() - date1;
        };

        const handlers = {
            onCancel: () => {
                clearTimeout(ident as NodeJS.Timeout);
            },
            onPause: () => {
                clearTimeout(ident as NodeJS.Timeout);
                totalTimeRun = onTimeDiff(startTime, null);
                complete = totalTimeRun >= countdown;
            },
            onResume: () => {
                ident = complete ? -1 : setTimeout(fn, countdown - totalTimeRun);
            }
        };

        const startTime = new Date().getTime();
        ident = setTimeout(fn, countdown);

        return handlers;
    }

Answer 18

如果要隐藏多个div，可以使用setInterval和多个周期来执行以下操作：

<div id="div1">1</div><div id="div2">2</div>
<div id="div3">3</div><div id="div4">4</div>
<script>
    function hideDiv(elm){
        var interval,
            unit = 1000,
            cycle = 5,
            hide = function(){
                interval = setInterval(function(){
                    if(--cycle === 0){
                        elm.style.display = 'none';
                        clearInterval(interval);
                    }
                    elm.setAttribute('data-cycle', cycle);
                    elm.innerHTML += '*';
                }, unit);
            };
        elm.onmouseover = function(){
            clearInterval(interval);
        };
        elm.onmouseout = function(){
            hide();
        };
        hide();
    }
    function hideDivs(ids){
        var id;
        while(id = ids.pop()){
            hideDiv(document.getElementById(id));
        }
    }
    hideDivs(['div1','div2','div3','div4']);
</script>

javascript：pause setTimeout（）;

18 个答案:

其他功能