CDATA真的有必要吗？ [英] Is CDATA really necessary?
问题描述
我使用内联Javascript，通常在我制作的WordPress主题中。直到几个月前，我还没有听说过在 //<！[CDATA [... //]]> 中包装内联Javascript，我一直在以相当的能力完成这些工作几年。
I use inline Javascript quite a bit, usually in WordPress themes that I make. I had not heard of wrapping inline Javascript in //<![CDATA[ ... //]]> up until a few months ago, and I have been doing this stuff at a fair level of competency for a few years.
我google了一下，我听说人们使用它，因为他们的Javascript不会验证。我使用严格的1.0 xHTML文档类型，并且在验证我的标记时从未遇到过问题。是因为我使用jquery，还是因为我通常只有几行代码来激活插件？或者w3验证器在这方面是否宽松？不使用这些CDATA标记时是否有任何功能影响的证据？
I googled around and I hear that people use this because their Javascript doesn't validate otherwise. I use a strict 1.0 xHTML doctype and have never had a problem validating my markup. Is it because I use jquery, or because usually I only have a few lines of code to activate a plugin? Or is the w3 validator being lenient in this regard? Is there any evidence of functional impact when not using these CDATA markings?
推荐答案
今天只有你需要你的XHTML文件才真正需要它有效。例如这个简单的东西是无效的，因为javascript中的< p> 标签与CDATA验证
Today it's only really required if you want your XHTML document to be valid. e.g. something as simple as this is invalid because of the <p> tags in the javascript with the CDATA it validates
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xml:lang="en" xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>foo</title>
<script type="text/javascript">
alert("<p>Hallo</p>");
</script>
</head>
<body>
</body>
</html>
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