当 Facebook 抓取工具发现
当 Facebook 抓取工具查看我的页面时，它会在发现 noscript 标签时关闭 head 标签。如果您查看页面源代码，您将看到元标记位于页面的 head 标记内。查看调试器中的错误： http://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fwww.rightmove.co.uk%2Fproperty-for-sale%2Fproperty-34534103。 html
在 Facebook 开放图调试器上，您会看到一个不同的页面，该页面已提前关闭 head 标签：http://developers.facebook.com/tools/debug/og/echo?q=http%3A%2F%2Fwww.rightmove.co.uk%2Fproperty-for-sale%2Fproperty-34534103。 html
奇怪诶？
When the Facebook scraper looks at my page it closes the head tag when it finds a noscript tag. If you view the page source you will see that the meta tags are within the head tag of the page. Look at the debugger for the error: http://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fwww.rightmove.co.uk%2Fproperty-for-sale%2Fproperty-34534103.html
On the Facebook open graph debugger you get a different page that has closed the head tag early: http://developers.facebook.com/tools/debug/og/echo?q=http%3A%2F%2Fwww.rightmove.co.uk%2Fproperty-for-sale%2Fproperty-34534103.html
Strange ehy?
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标记在元素中无效，是吗？也许 Facebook 的解析器正在考虑 noscript 标签的存在隐式结束？另请参阅此处：中
A
<noscript>tag wouldn't be valid in a<head>element would it? Maybe Facebook's parser is considering the presence of the noscript tag to be implicitly ending the<head>?See here also: <noscript> in <head>