Cgifederal.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “button” role is unnecessary for element “button”.
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Duplicate attribute “type”.
Element “h3” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “alt” not allowed on element “a” at this point.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Element “div” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
The “main” element must not appear as a descendant of the “section” element.
The “main” element must not appear as a descendant of the “main” element.
A document must not include more than one visible “main” element.
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