Everything-everywhere.com W3C HTML Markup Validation
HTML markup errors and warnings
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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”.
The “contentinfo” role is unnecessary for element “footer”.
The “complementary” role is unnecessary for element “aside”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Errors:
Attribute “href” not allowed on element “use” at this point.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The “center” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
Duplicate attribute “class”.
Bad value “32px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Element “summary” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “details” is missing a required instance of child element “summary”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
The “itemprop” attribute was specified, but the element is not a property of any item.
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