Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “February 27, 2018” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
Bad value “November 30, 2017” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “October 3, 2017” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “September 18, 2017” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “September 28, 2017” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “September 26, 2017” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “July 6, 2018” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “September 14, 2017” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Stray end tag “a”.
End tag “li” seen, but there were open elements.
Unclosed element “span”.
The “center” element is obsolete. Use CSS instead.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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