Mattermark.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Duplicate attribute “lang”.
Bad value “x-dns-prefetch-control” for attribute “http-equiv” on element “meta”.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Attribute “sketch:type” not allowed on element “g” at this point.
Attribute “sketch:type” not allowed on element “path” at this point.
Attribute “sketch:type” not allowed on element “rect” at this point.
Duplicate ID “Page-1”.
Duplicate ID “Shape”.
Duplicate ID “Artboard-1”.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “sketch:type” is not serializable as XML 1.0.
The first occurrence of ID “Page-1” was here.
The first occurrence of ID “Shape” was here.
The first occurrence of ID “Artboard-1” was here.
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