Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “aside” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “subbox1”.
Duplicate ID “subbox”.
Duplicate ID “subbutton”.
Attribute “alt” not allowed on element “div” at this point.
Bad value “180px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “center” element is obsolete. Use CSS instead.
End tag “div” seen, but there were open elements.
Unclosed element “center”.
Quote “'” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Bad value for attribute “type” on element “script”: Expected a token character, whitespace or a semicolon but saw “"” instead.
Attribute “cat'” not allowed on element “script” at this point.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “subbox1” was here.
The first occurrence of ID “subbox” was here.
The first occurrence of ID “subbutton” was here.
The “complementary” role is unnecessary for element “aside”.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Attribute “cat'” is not serializable as XML 1.0.
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