jQuery自动标题编号 [英] jQuery automatic heading numbering

问题描述

我在网站上有10-15个H2标签字幕的文章.像那样.

I have articles on website with 10-15 H2 tag subtitles. Something likes that.

<h1>Name of article</h1>
<h2>Subtitle</h2>
<p>.....</p>
<h2>Subtitle</h2>
<p>.....</p>
<h2>Subtitle</h2>
<p>.....</p>
<h2>Subtitle</h2>
<p>.....</p>

因此，问题是jQuery如何自动给每个H2标签(字幕)编号?

So, question is how to give number for each H2 tag (subtitle) automatically by jQuery in descending order?

<h1>Name of article</h1>
<h2>15.Subtitle</h2>
<p>.....</p>
<h2>14.Subtitle</h2>
<p>.....</p>
<h2>13.Subtitle</h2>
<p>.....</p>
<h2>12.Subtitle</h2>
<p>.....</p>

我知道如何通过CSS计数器来做到这一点，但是文章可以包含不同数量的字幕.我已经检查了类似的使用jQuery自动对标题H1-H6进行编号主题，但这不是我想要的.

I know how to do it via CSS counters, but articles can contain different numbers of subtitles. I've checked similar Automatic Numbering of Headings H1-H6 using jQuery topic, but it is not i want exactly.

推荐答案

这应该有帮助

var h2Elements = $('.content').find('h2');
var h2ElemCount = h2Elements.length;
$(h2Elements).each(function(i) {
  $(this).prepend(h2ElemCount - i + '. ');
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<div class="content">
  <h1>Name of article</h1>
  <h2>Subtitle</h2>
  <p>.....</p>
  <h2>Subtitle</h2>
  <p>.....</p>
  <h2>Subtitle</h2>
  <p>.....</p>
  <h2>Subtitle</h2>
  <p>.....</p>
</div>

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