setTimeout()：如果 EcmaScript 规范中没有定义，我在哪里可以了解它是如何工作的？
我有 另一个关于 setTimeout() 的问题 ，其中用户提到如果函数参数是一个字符串，它将在全局范围内进行计算，否则就不会。这令人大开眼界，所以我试图找到有关 setTimeout 实际工作原理的更多信息，但它不是 EcmaScript 规范的一部分，甚至 MDN 也没有我在 SO 中找到的特定信息。
关于 setTimeout() 如何工作有一些好的参考吗？
I had another question in SO about setTimeout(), where a user mentioned that if the function argument is a string it gets evaluated in global scope, other wise it's not. This was an eye-opener, so I tried to find more info about how setTimeout actually works, but it's not part of the EcmaScript spec and not even MDN had that specific of of information I found in SO.
Is there some good reference about how setTimeout() works?
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setTimeout等不在 ECMAScript 规范中，因为它们不是 JavaScript 功能。它们是浏览器环境的window对象的功能。其他环境（Windows Scripting Host、NodeJS 等）不一定具有这些功能。W3C 一直在尝试标准化
window对象及其各种功能（包括setTimeout），最新内容位于 HTML5 规范的计时器部分。其中很多都是对浏览器已经做的事情进行了编纂，尽管其中一些（比如最小间隔值必须是4[毫秒]）似乎（对我来说）是不合适的API 规范和实现似乎有自己的决定（在测试中，您可以看到当前的浏览器很高兴地做更短的间隔，与Opera 显然是个例外，它似乎按照规范进行操作）。setTimeoutand such aren't in the ECMAScript specification because they're not JavaScript features. They're features of the browser environment'swindowobject. Other environments (Windows Scripting Host, NodeJS, etc.) won't necessarily have those features.The W3C has been trying to standardize the
windowobject and its various features (includingsetTimeout), the latest is in the timers section of the HTML5 spec. A lot of it is codifying what browsers already do, although some of it (like saying that the minimum interval value must be4[milliseconds]) seems (to me) to be out-of-place for an API specification and implementations seem to make up their own minds (in tests, you can see current browsers happily doing a shorter interval, with the apparent exception of Opera which appears to do what the spec says).setTimeout()方法是window对象上的一个方法。您可以在下面找到 MDN 文档的链接：https://developer.mozilla.org/ /DOM/window.setTimeout
The
setTimeout()method is a method on thewindowobject. You can find the link to the MDN documentation below:https://developer.mozilla.org/en/DOM/window.setTimeout