Upike.edu W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
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.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
Bad value “button” for attribute “role” on element “li”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “li” seen, but there were open elements.
Unclosed element “div”.
Bad value “” for attribute “poster” on element “video”: Must be non-empty.
Bad value “1080px” for attribute “height” on element “video”: Expected a digit but saw “p” instead.
Bad value “1920px” for attribute “width” on element “video”: Expected a digit but saw “p” instead.
Bad value “” for attribute “src” on element “source”: Must be non-empty.
The “sizes” attribute may be specified only if the “srcset” attribute is also present.
Element “h1” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
United States US