Factmyth.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “xmlns:ng” not allowed here.
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 attribute “role”.
Attribute “collapse” not allowed on element “nav” at this point.
Attribute “dropdown” not allowed on element “li” at this point.
Attribute “dropdown-toggle” not allowed on element “a” at this point.
Duplicate attribute “class”.
Attribute “tooltip” not allowed on element “a” at this point.
Stray end tag “div”.
Duplicate attribute “href”.
Warnings:
Attribute with the local name “xmlns:ng” is not serializable as XML 1.0.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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