Warroom.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.
The element “button” must not appear as a descendant of the “a” element.
The “center” element is obsolete. Use CSS instead.
Element “h3,” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
End tag “div” seen, but there were open elements.
Unclosed element “h3,”.
Unclosed element “h3”.
Bad value “designer” for attribute “rel” on element “a”: The string “designer” is not a registered keyword.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
Empty heading.
Element name “h3,” cannot be represented as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
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