Unece.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Attribute “hreflang” not allowed on element “li” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “loading” not allowed on element “img” at this point.
Element “style” not allowed as child of element “p” in this context. (Suppressing further errors from this subtree.)
CSS: “overvlow”: Property “overvlow” doesn't exist.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
End tag “div” seen, but there were open elements.
Unclosed element “span”.
Warnings:
The “navigation” role is unnecessary for element “nav”.
The “type” attribute for the “style” element is not needed and should be omitted.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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