Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “navigation” role is unnecessary for element “nav”.
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
Bad value “ImageToolbar” for attribute “http-equiv” on element “meta”.
Attribute “target” not allowed on element “li” at this point.
Attribute “alt” not allowed on element “source” at this point.
Bad value “video/webm;codes='vp8.0, vorbis'” for attribute “type” on element “source”: Expected a token character, whitespace or a semicolon but saw “,” instead.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Element “div” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Attribute “datatype” not allowed on element “span” at this point.
Attribute “content” not allowed on element “span” at this point.
The element “button” must not appear as a descendant of the “a” element.
Attribute “autocorrect” not allowed on element “input” at this point.
Attribute “autocapitalize” not allowed on element “input” at this point.
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