Ruyo.net W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
Bad value “Bookmark” for attribute “rel” on element “link”: The string “Bookmark” is not a registered keyword.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
End tag “a” violates nesting rules.
Stray end tag “span”.
Bad value “navigation” for attribute “role” on element “ul”.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “navigation” role is unnecessary for element “nav”.
The “article” role is unnecessary for element “article”.
The “contentinfo” role is unnecessary for element “footer”.
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