Warnings:
The “banner” role is unnecessary for element “header”.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “navigation” role is unnecessary for element “nav”.
Attribute “<a” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Errors:
The “center” element is obsolete. Use CSS instead.
The “align” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Stray end tag “center”.
Bad value “4” for attribute “border” on element “img”: Only “0” is a permitted zero literal.
End tag “article” seen, but there were open elements.
Unclosed element “div”.
Bad value “1” for attribute “border” on element “img”: Only “0” is a permitted zero literal.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “align” attribute on the “h2” element is obsolete. Use CSS instead.
A slash was not immediately followed by “>”.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
Attribute “<a” not allowed on element “br” at this point.
Attribute “href” not allowed on element “br” at this point.
Stray end tag “a”.
End tag “p” implied, but there were open elements.
Unclosed element “noscript”.
Stray end tag “noscript”.
No “p” element in scope but a “p” end tag seen.
End tag “footer” seen, but there were open elements.
Stray end tag “div”.
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