SetInterval 是否在单独的线程上运行?该方法是如何工作的? [英] Does SetInterval run things on a seperate thread? How does the method work?

问题描述

我环顾四周，试图了解 SetInterval 是如何使用的，但只找到了如何使用它.我已经知道它的功能，我只是想知道当 JS 不支持线程时它如何能够在单独的线程上运行某些东西(至少我是这么读的).

I've looked around trying to understand how SetInterval but only found how to use it. I already know it's functionality, I'm just curious about how it's able to run something on a separate thread when JS doesn't support threading(at least that's what I read).

我希望我正确地表述了这个问题.

I hope I formulated the question properly.

谢谢.

推荐答案

setInterval 不在不同的线程上运行任何东西.它会安排一些东西在特定时间运行前提是当时 JS 运行时是空闲的.

setInterval does not run anything on a different thread. It schedules something to run at certain times provided the JS runtime is idle at that time.

您可以通过以下方式尝试这种行为:

You can try out this behavior with something like this:

setInterval(function(){ alert("Hello"); }, 1000);
while (true) { }

无限循环会阻止函数运行，因为JS运行时卡在循环中.

The infinite loop will prevent the function from running, because the JS runtime is stuck in the loop.

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