Gnu.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
The element “button” must not appear as a descendant of the “a” element.
Attribute “value” not allowed on element “a” at this point.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “contentinfo” role is unnecessary for element “footer”.
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