Whufc.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “article” role is unnecessary for element “article”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
Attribute “about” not allowed on element “article” at this point.
Attribute “content” not allowed on element “span” at this point.
Bad value “” for attribute “name” on element “button”: Must not be empty.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “language” attribute on the “script” element is obsolete. Use the “type” attribute instead.
The “aria-labelledby” attribute must point to an element in the same document.
United Kingdom GB