如何在html注释中找到包含特定文本的html元素？ [英] How can I find html elements that contain specific text in an html comment?

问题描述

我想使用jQuery来识别< td>包含特定HTML注释文本的元素。标准的：contains选择器似乎没有查看评论。我的上下文是，我想动态添加一些内容到同一个td元素。这里是目标td的示例：

I'm trying to use jQuery to identify <td> elements which contain specific HTML comment text. The standard ":contains" selector doesn't seem to be looking into the comments. My context here is that I want to dynamically add some content to that same td element. Here's a sample of the target td:

<TD valign="top" class="ms-formbody" width="400px">
        <!-- FieldName="Title"
             FieldInternalName="Title"
             FieldType="SPFieldText"
          -->
            <span dir="none">
        <input name="ctl00$m$g_0b1e4ca3_9450_4f3e_b3af_8134fe014ea5$ctl00$ctl04$ctl00$ctl00$ctl00$ctl04$ctl00$ctl00$TextField" type="text" maxlength="255" id="ctl00_m_g_0b1e4ca3_9450_4f3e_b3af_8134fe014ea5_ctl00_ctl04_ctl00_ctl00_ctl00_ctl04_ctl00_ctl00_TextField" title="Title" class="ms-long" /><br>
    </span>


        </TD>

这个html是由SharePoint生成的一个新的列表项表单的一部分，我真的想找到在我的文档中的td，其中FieldInternalName在注释中匹配一些文本字符串。

This html is generated by SharePoint as part of a new list item form, and I really want to find the td in my document whose "FieldInternalName" in the comment matches some text string. How can I use jQuery (or any javascript would really be okay) to best find these td elements?

推荐答案

你可以使用jQuery（或任何javascript会真的会好起来）找到这些td元素。 innerHTML ，并在其上运行正则表达式。

You could grab the innerHTML of the element and run a regular expression over it.

示例：

// HTML: <div id="myElement">Lorem <!-- a comment --> ipsum.</div>

var element = document.getElementById('myElement');
alert(element.innerHTML); // alerts "Lorem <!-- a comment --> ipsum."
// here you could run a regular expression

更新：一个更全面的例子（使用jQuery）：

Update: a more comprehensive example (with jQuery):

var tds = $('td'), match;
tds.each(function(index, element) {
    match = $(element).innerHTML.match(/FieldInternalName="(^["])"/);
    if (match) alert(match);
});

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