C-heads.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “complementary” role is unnecessary for element “aside”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
The “navigation” role is unnecessary for element “nav”.
Errors:
The “center” element is obsolete. Use CSS instead.
CSS: “background”: Parse Error.
No space between attributes.
Element “ul” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
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