Herringbank.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Duplicate attribute “prefix”.
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
No “p” element in scope but a “p” end tag seen.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “p” in this context. (Suppressing further errors from this subtree.)
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
Attribute “border” not allowed on element “iframe” at this point.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag for “body” seen, but there were unclosed elements.
Unclosed element “div”.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
Empty heading.
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