Playitusa.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “article” seen, but there were open elements.
Unclosed element “div”.
End tag “aside” seen, but there were open elements.
Duplicate ID “linkcat-2”.
Attribute “xmlns:cc” not allowed here.
Bad value “cc:attributionURL” for attribute “rel” on element “a”: The string “cc:attributionURL” is not a registered keyword.
Warnings:
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The first occurrence of ID “linkcat-2” was here.
Attribute with the local name “xmlns:cc” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
This document appears to be written in Italian but the “html” start tag has “lang="en-US"”. Consider using “lang="it"” (or variant) instead.
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