Warnings:
The “type” attribute for the “style” element is not needed and should be omitted.
The “type” attribute is unnecessary for JavaScript resources.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “complementary” role is unnecessary for element “aside”.
Attribute “)uri” is not serializable as XML 1.0.
Attribute “'popupwindow',” is not serializable as XML 1.0.
Attribute “'scrollbars” is not serializable as XML 1.0.
Attribute “true"” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Errors:
Duplicate attribute “method”.
Duplicate attribute “id”.
No space between attributes.
“'” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Saw “'” when expecting an attribute name. Probable cause: “=” missing immediately before.
Quote “'” in attribute name. Probable cause: Matching quote missing somewhere earlier.
“=” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “)uri” not allowed on element “form” at this point.
Attribute “'popupwindow',” not allowed on element “form” at this point.
Attribute “'scrollbars” not allowed on element “form” at this point.
Attribute “true"” not allowed on element “form” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “follow” for attribute “rel” on element “a”: The string “follow” is not a registered keyword.
The “center” element is obsolete. Use CSS instead.
Stray end tag “a”.
End tag “center” seen, but there were open elements.
Unclosed element “div”.
A slash was not immediately followed by “>”.
End tag had attributes.
Stray end tag “div<”.
Attribute “href” not allowed on element “button” at this point.
End tag for “body” seen, but there were unclosed elements.
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