Universonline.nl W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “xmlns:fb” not allowed here.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Duplicate ID “main-nav”.
Duplicate ID “top-search”.
Bad value “2018 May 18” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Attribute “pubdate” not allowed on element “time” at this point.
Bad value “Wed 2018 May 18” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “Tue 2018 May 18” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “Mon 2018 May 18” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
No “li” element in scope but a “li” end tag seen.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “main-nav” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “top-search” was here.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “contentinfo” role is unnecessary for element “footer”.
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