有没有用于查询评论节点的DOM API？ [英] Is there a DOM API for querying comment nodes?

问题描述

我有一个文档，其中有一个调试注释，如下所示：

I have a document with a debugging comment in it that looks like this:

<!--SERVER_TRACE {...}-->

有没有办法查询DOM来访问这个节点？我正在寻找一个香草JavaScript解决方案，没有任何图书馆的帮助。

Is there a way to query the DOM to access this node? I am looking for a vanilla JavaScript solution, without the aid of any libraries.

我的第一个想法是深入首先搜索DOM并比较节点类型值作为评论， Node.COMMENT_NODE 。有一个更简单的方法吗？

My first thought was to depth first search the DOM and compare nodes found against the node type value for comments, Node.COMMENT_NODE. Is there an easier way?

推荐答案

有 TreeWalker API： / p>

There's the TreeWalker APIs:

var tw = document.createTreeWalker(document, NodeFilter.SHOW_COMMENT, null, null),
    comment;
while (comment = tw.nextNode()) {
    // ...
}

IE8不支持此功能。

This isn't supported by IE8 and lower.

TJ在评论中提供了一个链接到规格。我总是只使用TreeWalkers，但在你的情况下，一个 NodeIterator 也很好。

T.J. in the comments provided a link to the specs. I kind of always use just TreeWalkers, but in your case a NodeIterator is fine too.

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