javaScript不是DOM的一部分吗？ [英] Is the javaScript not part of the DOM?

问题描述

为什么脚本仍然可以运行，即使从DOM中删除用于创建代码的代码？

一种情况，我想防止破坏的脚本运行（ @看到我的帖子）。

I ran into a situation where I wanted to prevent a broken script from running (@see my post).

在我试图想出一个解决方案写了一个扩展名，使用以下行（只是看看会发生什么）。

In my attempt to come up with a solution I wrote an extension with the following line (just to see what would happen).

$('script', doc).remove();
/*doc is passed here because this script is running as a firefox extension 
  outside of the document context.*/

我假设这将从DOM中删除所有的脚本，这样做就是这样，所以没有脚本会在页面上运行，而不是这样。

I assumed that this would remove all the scripts from the DOM, which it did, and that therefore no scripts would run on the page, which is not the case.

我很想知道这个行为背后的内容。

I would love to know more about what's behind this behavior.

推荐答案

脚本是一部分的DOM，但是执行该脚本的结果是JavaScript引擎。删除脚本的源代码（DOM中的部分）不会删除引擎内存中的现有变量。

The script is part of the DOM, sure, but the result of that script executing is left up to the javascript engine. Removing a script's source (the part that's in the DOM) will not remove existing varibles in the engine's memory.

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