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
一行使用Promise
const wait = t => new Promise(s => setTimeout(s, t, t));
带有中止信号的字体
const wait = (x: number, signal?: AbortSignal): Promise<number> => {
return new Promise((s, f) => {
const id = setTimeout(s, x, x);
signal?.addEventListener('abort', () => {
clearTimeout(id);
f('AbortError');
});
});
};
Demo
const wait＝t＝＞new Promise（s＝＞setTimeout（s，t））；//用途异步函数demo（）{//倒计时设i=6；而（i-）{等待等待（1000）；控制台日志（i）；}//数字0到5的总和，延迟1秒constsum=await[…Array（6）.keys（）].reduce（async（a，b）=>{a=等待a；等待等待（1000）；常量结果=a+b；console.log（`${a}+${b}=${result}`）；返回结果；}，承诺.决议（0））；console.log（“sum”，总和）；}demo（）；
其他回答
这可能会奏效。它在C和JavaScript中对我有用。
function sleep(time) {
var x = 0;
for(x = 0;x < time;x++) {/* Do nothing */}
}
这里大多数解决方案的问题是它们倒带堆栈。在某些情况下，这可能是一个大问题。在这个例子中，我展示了如何以不同的方式使用迭代器来模拟真实的睡眠。
在本例中，生成器正在调用自己的next（），因此一旦它启动，它就自己运行了。
var h = a();
h.next().value.r = h; // That's how you run it. It is the best I came up with
// Sleep without breaking the stack!!!
function *a(){
var obj = {};
console.log("going to sleep....2s")
setTimeout(function(){obj.r.next();}, 2000)
yield obj;
console.log("woke up");
console.log("going to sleep no 2....2s")
setTimeout(function(){obj.r.next();}, 2000)
yield obj;
console.log("woke up");
console.log("going to sleep no 3....2s")
setTimeout(function(){obj.r.next();}, 2000)
yield obj;
console.log("done");
}
你可以这样做。所有函数都可以继承的休眠方法：
Function.prototype.sleep=函数（延迟，…args）{setTimeout（（）=>this（…args），delay）}console.log.sleep（2000年，“你好，世界！！”）
没有任何依赖关系的最短解决方案：
await new Promise(resolve => setTimeout(resolve, 5000));
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);
}
}
