Procpr.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Attribute “xmlns:fb” not allowed here.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “h1” in this context. (Suppressing further errors from this subtree.)
Element “span” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “strong” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “option” without attribute “label” must not be empty.
Attribute “alt” not allowed on element “a” 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.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
Stray start tag “script”.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Consider avoiding viewport values that prevent users from resizing documents.
The “navigation” role is unnecessary for element “nav”.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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