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  <author_name>shigemk2</author_name>
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  <blog_title>by shigemk2</blog_title>
  <blog_url>https://www.shigemk2.com/</blog_url>
  <categories>
    <anon>CSS</anon>
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  <description>疑似要素にz-indexをつけると、疑似要素を背面にしたり前面に出したりできる。HTML &lt;!DOCTYPE html&gt; &lt;html lang=&quot;ja&quot;&gt; &lt;head&gt; &lt;meta charset=&quot;utf-8&quot;&gt; &lt;title&gt;HOGE&lt;/title&gt; &lt;link rel=&quot;stylesheet&quot; type=&quot;text/css&quot; href=&quot;./hoge.css&quot;&gt; &lt;/head&gt; &lt;body&gt; &lt;div class=&quot;hoge&quot;&gt; &lt;div class=&quot;fuga&quot;&gt;&lt;/div&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; CSS body { background-color: rgb…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2013-02-09 17:27:26</published>
  <title>疑似要素とz-index</title>
  <type>rich</type>
  <url>https://www.shigemk2.com/entry/20130209/1360398446</url>
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