Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Attribute “about” not allowed on element “article” at this point.
Bad value “ (min-width:880px) 25vw, 100vw.” for attribute “sizes” on element “img”: Expected units (one of “em”, “ex”, “ch”, “rem”, “vw”, “vh”, “vmin”, “vmax”, “cm”, “mm”, “q”, “in”, “pc”, “pt”, “px”) but found “vw.” at “…width:880px) 25vw, 100vw.”.
No space between attributes.
The element “footer” must not appear as a descendant of the “footer” element.
End tag “div” seen, but there were open elements.
Unclosed element “footer”.
The “aria-controls” attribute must point to an element in the same document.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
The “contentinfo” role is unnecessary for element “footer”.
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