Nvtrlab.jp W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Errors:
Attribute “itemprop” not allowed on element “meta” at this point.
Element “haeder” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
End tag “a” violates nesting rules.
Stray end tag “span”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “alt” not allowed on element “a” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “contentinfo” role is unnecessary for element “footer”.
Japan JP