Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “;” is not serializable as XML 1.0.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The “charset” attribute on the “script” element is obsolete.
Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.
Errors:
Element “hr” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “;” not allowed on element “input” at this point.
The “center” element is obsolete. Use CSS instead.
The “main” element must not appear as a descendant of the “section” element.
The “main” element must not appear as a descendant of the “article” element.
A document must not include more than one visible “main” element.
Element “center” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
End tag “div” seen, but there were open elements.
Unclosed element “center”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag “ul” seen, but there were open elements.
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