Zhengjian.org 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”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
Element “div” is missing required attribute “aria-valuemax”.
Element “div” is missing required attribute “aria-valuemin”.
Element “div” is missing required attribute “aria-valuenow”.
Bad value “recommend” for attribute “role” on element “div”.
Bad value “shenyun” for attribute “role” on element “div”.
Bad value “recent” for attribute “role” on element “div”.
Bad value “” for attribute “name” on element “button”: Must not be empty.
Bad value “zhengjian_book” for attribute “role” on element “div”.
Bad value “images” for attribute “role” on element “div”.
The “for” attribute of the “label” element must refer to a non-hidden form control.
The “aria-labelledby” attribute must point to an element in the same document.
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