Nautilusinc.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bogus doctype.
Quirky doctype. Expected “<!DOCTYPE html>”.
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 “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Duplicate ID “social-header”.
End tag “h1” seen, but there were open elements.
Unclosed element “sup”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “h3” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “social-header” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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