F8.com 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”.
The “link” role is unnecessary for element “a”.
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.
Errors:
Bad value “image” for attribute “role” on element “svg”.
Element “description” not allowed as child of element “svg” in this context. (Suppressing further errors from this subtree.)
Attribute “title” not allowed on element “svg” at this point.
Attribute “description” not allowed on element “svg” at this point.
Bad value “_blanks” for attribute “target” on element “a”: Reserved keyword “blanks” used.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
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