拦截JavaScript对DOM的访问 [英] Intercept access to DOM by JavaScript

问题描述

我想知道如何通过JavaScript拦截DOM访问。有没有可用的工具或白皮书？ （否则我需要写一个！）

I wanted to know how do I intercept a DOM access by a JavaScript. Are there any tools or whitepapers available on this ? (Else I will need to write one!)

拦截背后的想法与Web浏览器的安全模块有关。

The idea behind the interception is something to do with a security module for web browsers.

谢谢。

推荐答案

你能做的最好就是< a href =http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-eventgroupings-mutationevents =nofollow noreferrer> DOM突变事件。有各种事件，例如 DOMNodeInserted ， DOMNodeRemoved ， DOMAttrModified 等（参见上面链接的DOM事件规范）。有一个名为 DOMSubtreeModified 的普通catch-all事件在任何单个DOM变异后被触发;此事件会冒泡，因此您可以在文档上设置一个侦听器，以通知文档DOM的所有更改。

The best you can do is use DOM mutation events. There are various events such as DOMNodeInserted, DOMNodeRemoved, DOMAttrModified etc (see the DOM events spec, linked to above). There is a general catch-all event called DOMSubtreeModified that is fired after any individual DOM mutation; this event bubbles, so you can set a listener on the document to be notified of all changes to the document's DOM.

document.addEventListener("DOMSubtreeModified", function(evt) {
    console.log("DOM mutation", evt);
}, false);

最新的浏览器支持这些事件，IE除外（包括版本8） ）和Opera，它支持一些偶数，但特别是 DOMSubtreeModified 。

These events are supported in most recent browsers, with the exception of IE (up to and including version 8) and Opera, which supports some evenbts but notably not DOMSubtreeModified.

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