Gittlerinstruments.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “” for attribute “media” on element “link”: Media query ended prematurely.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
The “font” element is obsolete. Use CSS instead.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
Duplicate attribute “class”.
Attribute “<div” not allowed on element “div” at this point.
End tag “div” seen, but there were open elements.
Unclosed element “section”.
Stray end tag “section”.
End tag “b” violates nesting rules.
No “u” element in scope but a “u” end tag seen.
Element “source” not allowed as child of element “video” in this context. (Suppressing further errors from this subtree.)
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Stray end tag “div”.
Warnings:
Empty heading.
The “navigation” role is unnecessary for element “nav”.
Attribute “<div” is not serializable as XML 1.0.
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