有没有比下面的pausecomp函数（取自此处）更好的方法来设计JavaScript中的睡眠？
function pausecomp(millis)
{
var date = new Date();
var curDate = null;
do { curDate = new Date(); }
while(curDate-date < millis);
}
这不是JavaScript中的Sleep的重复-动作之间的延迟；我希望在函数的中间有一个真正的睡眠，而不是在代码执行之前有一段延迟。
当前回答
我在JavaScript sleep/wait上搜索了很多网页。。。如果你想让JavaScript“RUN，DELAY，RUN”。。。大多数人得到的要么是“RUN，RUN（无用的东西），RUN”，要么是“RUN，RUN+延迟RUN”。。。
我想：这是一个有效的解决方案。。。但你必须把你的跑步代码切碎…：是的，我知道，这只是一个更容易理解的重构。。。还
示例1：
<html>
<body>
<div id="id1">DISPLAY</div>
<script>
// JavaScript sleep by "therealdealsince1982"; copyrighted 2009
// setInterval
var i = 0;
function run() {
// Pieces of codes to run
if (i == 0){document.getElementById("id1").innerHTML= "<p>code segment " + i + " is ran</p>"; }
if (i == 1){document.getElementById("id1").innerHTML= "<p>code segment " + i + " is ran</p>"; }
if (i == 2){document.getElementById("id1").innerHTML= "<p>code segment " + i + " is ran</p>"; }
if (i >2){document.getElementById("id1").innerHTML= "<p>code segment " + i + " is ran</p>"; }
if (i == 5){document.getElementById("id1").innerHTML= "<p>all code segment finished running</p>"; clearInterval(t); } // End interval, stops run
i++; // Segment of code finished running, next...
}
run();
t = setInterval("run()", 1000);
</script>
</body>
</html>
示例2：
<html>
<body>
<div id="id1">DISPLAY</div>
<script>
// JavaScript sleep by "therealdealsince1982"; copyrighted 2009
// setTimeout
var i = 0;
function run() {
// Pieces of codes to run, can use switch statement
if (i == 0){document.getElementById("id1").innerHTML= "<p>code segment " + i + " ran</p>"; sleep(1000);}
if (i == 1){document.getElementById("id1").innerHTML= "<p>code segment " + i + " ran</p>"; sleep(2000);}
if (i == 2){document.getElementById("id1").innerHTML= "<p>code segment " + i + " ran</p>"; sleep(3000);}
if (i == 3){document.getElementById("id1").innerHTML= "<p>code segment " + i + " ran</p>";} //stops automatically
i++;
}
function sleep(dur) {t=setTimeout("run()", dur);} // Starts flow control again after 'dur'
run(); // Starts
</script>
</body>
</html>
示例3：
<html>
<body>
<div id="id1">DISPLAY</div>
<script>
// JavaScript sleep by "therealdealsince1982"; copyrighted 2009
// setTimeout
var i = 0;
function flow() {
run(i);
i++; // Code segment finished running, increment i; can put elsewhere
sleep(1000);
if (i == 5) {clearTimeout(t);} // Stops flow, must be after sleep()
}
function run(segment) {
// Pieces of codes to run, can use switch statement
if (segment == 0){document.getElementById("id1").innerHTML= "<p>code segment " + segment + " is ran</p>"; }
if (segment == 1){document.getElementById("id1").innerHTML= "<p>code segment " + segment + " is ran</p>"; }
if (segment == 2){document.getElementById("id1").innerHTML= "<p>code segment " + segment + " is ran</p>"; }
if (segment >2){document.getElementById("id1").innerHTML= "<p>code segment "+ segment +" is ran</p>"; }
}
function sleep(dur) {t=setTimeout("flow()", dur);} // Starts flow control again after 'dur'
flow(); // Starts flow
</script>
</body>
</html>
示例4：
<html>
<body>
<div id="id1">DISPLAY</div>
<script>
// JavaScript sleep by "therealdealsince1982"; copyrighted 2009
// setTimeout, switch
var i = 0;
function flow() {
switch(i)
{
case 0:
run(i);
sleep(1000);
break;
case 1:
run(i);
sleep(2000);
break;
case 5:
run(i);
clearTimeout(t); // Stops flow
break;
default:
run(i);
sleep(3000);
break;
}
}
function run(segment) {
// Pieces of codes to run, can use switch statement
if (segment == 0){document.getElementById("id1").innerHTML= "<p>code segment " + segment + " is ran</p>"; }
if (segment == 1){document.getElementById("id1").innerHTML= "<p>code segment " + segment + " is ran</p>"; }
if (segment == 2){document.getElementById("id1").innerHTML= "<p>code segment " + segment + " is ran</p>"; }
if (segment >2){document.getElementById("id1").innerHTML= "<p>code segment " + segment + " is ran</p>"; }
i++; // Current segment of code finished running, next...
}
function sleep(dur) {t=setTimeout("flow()", dur);} // Starts flow control again after 'dur'
flow(); // Starts flow control for first time...
</script>
</body>
</html>
其他回答
出于对$DEITY的热爱，请不要使用忙等待睡眠功能。setTimeout和setInterval可以满足您的需要。
var showHide=document.getElementById（'showHide'）；setInterval（（）=>{showHide.style.visibility=“初始”；setTimeout（（）=>{showHide.style.visibility=“隐藏”}, 1000);}, 2000); ＜div id=“showHide”＞您好！再见</分区>
每隔两秒隐藏文本一秒。这显示了如何使用setInterval和setTimeout每秒显示和隐藏文本。
使用三种功能：
调用setInterval启动循环的函数一个函数，它调用clearInterval来停止循环，然后调用setTimeout来休眠，最后在setTimeout内调用作为回调来重新启动循环一个循环，跟踪迭代次数，设置睡眠次数和最大次数，一旦达到睡眠次数就调用睡眠函数，并在达到最大次数后调用clearInterval
var foo＝｛｝；函数main（）{“使用严格”；/*初始化全局状态*/foo.bar=foo.bar ||0；/*初始化计时器*/foo.bop=设置间隔（foo.baz，1000）；}睡眠=功能（计时器）{“使用严格”；clearInterval（计时器）；timer=setTimeout（function（）｛main（）｝，5000）；};foo.baz=函数（）{“使用严格”；/*更新状态*/foo.bar=数字（foo.bar+1）||0；/*日志状态*/console.log（foo.bar）；/*检查状态并在10时停止*/（foo.bar===5）&&睡眠（foo.bop）；（foo.bar==10）&&clearInterval（foo.bop）；};main（）；
工具书类
使用JavaScript开发游戏为什么iOS 8中的滚动事件更改是一件大事Ember.js中的实时轮询系统使用requestAnimationFrame（）驱动动画MDN:JavaScript并发模型和事件循环网格研究：Node.js在JavaScript中超过60fps第2部分：不阻塞单个线程的CPU密集型JavaScript计算
在某些情况下，一个很好的选择是显示一个顶级消息面板来停止用户交互，然后在得到等待的结果时再次隐藏它（异步）。这允许浏览器继续执行后台任务，但会暂停工作流，直到您返回结果。
从该链接获取的代码不会冻结计算机。但它只在Firefox中有效。
/**
* Netscape compatible WaitForDelay function.
* You can use it as an alternative to Thread.Sleep() in any major programming language
* that support it while JavaScript it self doesn't have any built-in function to do such a thing.
* parameters:
* (Number) delay in millisecond
*/
function nsWaitForDelay(delay) {
/**
* Just uncomment this code if you're building an extension for Firefox.
* Since Firefox 3, we'll have to ask for user permission to execute XPCOM objects.
*/
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
// Get the current thread.
var thread = Components.classes["@mozilla.org/thread-manager;1"].getService(Components.interfaces.nsIThreadManager).currentThread;
// Create an inner property to be used later as a notifier.
this.delayed = true;
/* Call JavaScript setTimeout function
* to execute this.delayed = false
* after it finishes.
*/
setTimeout("this.delayed = false;", delay);
/**
* Keep looping until this.delayed = false
*/
while (this.delayed) {
/**
* This code will not freeze your browser as it's documented in here:
* https://developer.mozilla.org/en/Code_snippets/Threads#Waiting_for_a_background_task_to_complete
*/
thread.processNextEvent(true);
}
}
我使用多线程HTML5 Worker，它将能够中止指向无响应URL的同步XMLHttpRequest。这不会阻止浏览器。
https://gist.github.com/el-gringo/6990785
