Objectfrontier.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “async” not allowed on element “link” at this point.
Bad value “image” for attribute “role” on element “a”.
Duplicate attribute “class”.
Bad value “100%” for attribute “width” on element “video”: Expected a digit but saw “%” instead.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Warnings:
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The “navigation” role is unnecessary for element “nav”.
The “banner” role is unnecessary for element “header”.
The “contentinfo” role is unnecessary for element “footer”.
This document appears to be written in English but the “html” start tag has an empty “lang” attribute. Consider using “lang="en"” (or variant) instead.
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