Artexhibition.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “figcaption” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “main-menu”.
Element “p” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “label” in this context. (Suppressing further errors from this subtree.)
The “label” element may contain at most one “button”, “input”, “meter”, “output”, “progress”, “select”, or “textarea” descendant.
Stray start tag “span”.
Stray end tag “span”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “main-menu” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “main” role is unnecessary for element “main”.
The “complementary” role is unnecessary for element “aside”.
“label” element with multiple labelable descendants.
The “contentinfo” role is unnecessary for element “footer”.
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