Theinformationlab.co.uk 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.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
End tag “div” seen, but there were open elements.
Unclosed element “section”.
Stray end tag “section”.
Duplicate attribute “href”.
No “p” element in scope but a “p” end tag seen.
Stray end tag “div”.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “contentinfo” role is unnecessary for element “footer”.
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