递归setInterval()连续运行 [英] Recursive setInterval() runs continuously

问题描述

我正在尝试使用递归setInterval函数使用JavaScript每5秒运行一个函数.

I'm trying to run a function every 5 seconds using JavaScript using a recursive setInterval function.

下面的代码只是尽可能快地记录启动"，然后使浏览器崩溃.为什么这不是每5秒运行一次?

The following code just logs "started" as fast as possible and then crashes the browser. Why is this not running every 5 seconds?

function five() {
console.log("five");
setInterval(five(), 5000);
}
five();

推荐答案

请勿以这种方式使用setInterval.使用setTimeout.通过调用setInterval，可以在每次调用该函数时创建一个UNIQUE计时器.SetTimeout将创建一个结束的计时器，然后创建一个新计时器.

Don't use setInterval this way. Use setTimeout. By calling setInterval, you create a UNIQUE timer every time the function is called. SetTimeout would create one timer that ends, and then creates a new timer.

您还应该更改引用 5 的方式. five()立即执行该功能.只是五个传递了一个函数引用，因此，如下所示.

You should also change the way you reference five. five() executes the function immediately. Just five passes a function reference, so do it as you see below.

function five() {
    console.log("five");
    setTimeout(five, 5000);
}
five();

当然，您始终可以将函数调用作为要评估的字符串传递:

Of course, you can always pass the function call as a string to be evaluated:

    setTimeout("five()", 5000); // note the quotes

但这通常被认为是不好的做法.

But this is generally considered bad practice.

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