The <noscript> Tag in HTML 5

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Avoid the HTML <noscript> Tag

The <noscript> tag should be avoided because it is handled differently by different browsers depending on how the document is being parsed. If the document is being parsed as xHTML, the XML serialization of HTML, or as pure XML, the fallback content will not appear as expected because is usage relies on an HTML parser.

In addition, if scripting is turned off by a mechanism other than the browser, such as a firewall, the fallback content will not appear as expected.

Valid HTML 5